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configure.ac
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/
configure.ac
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# This file is part of libmicrohttpd.
# (C) 2006-2021 Christian Grothoff (and other contributing authors)
# (C) 2014-2024 Evgeny Grin (Karlson2k)
#
# libmicrohttpd is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 3, or (at your
# option) any later version.
#
# libmicrohttpd is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with libmicrohttpd; see the file COPYING. If not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.
#
#
# Process this file with autoconf to produce a configure script.
#
#
AC_PREREQ([2.64])
LT_PREREQ([2.4.0])
AC_INIT([GNU libmicrohttpd],[1.0.1],[libmicrohttpd@gnu.org])
AC_CONFIG_AUX_DIR([build-aux])
MHD_AUX_DIR='build-aux' # Must be set to the same value as in the previous line
AC_CONFIG_HEADERS([MHD_config.h])
AC_CONFIG_MACRO_DIR([m4])
m4_pattern_forbid([^_?MHD_[A-Z_]+_CC_])dnl
LIB_VERSION_CURRENT=74
LIB_VERSION_REVISION=1
LIB_VERSION_AGE=62
AC_SUBST([LIB_VERSION_CURRENT])
AC_SUBST([LIB_VERSION_REVISION])
AC_SUBST([LIB_VERSION_AGE])
PACKAGE_VERSION_MAJOR='m4_car(m4_unquote(m4_split(AC_PACKAGE_VERSION, [\.])))'
PACKAGE_VERSION_MINOR='m4_argn(2, m4_unquote(m4_split(AC_PACKAGE_VERSION, [\.])))'
PACKAGE_VERSION_SUBMINOR='m4_argn(3, m4_unquote(m4_split(AC_PACKAGE_VERSION, [\.])))'
AS_VAR_ARITH([MHD_W32_DLL_SUFF],[[$LIB_VERSION_CURRENT - $LIB_VERSION_AGE]])
AC_SUBST([PACKAGE_VERSION_MAJOR])
AC_SUBST([PACKAGE_VERSION_MINOR])
AC_SUBST([PACKAGE_VERSION_SUBMINOR])
AC_SUBST([MHD_W32_DLL_SUFF])
AC_CONFIG_FILES([src/microhttpd/microhttpd_dll_res.rc])
CONF_FINAL_WARNS=""
MHD_LIB_CPPFLAGS=""
MHD_LIB_CFLAGS=""
MHD_LIB_LDFLAGS=""
MHD_LIBDEPS=""
# for pkg-config
MHD_REQ_PRIVATE=''
MHD_LIBDEPS_PKGCFG=''
AS_IF([test -z "$CC" && test -z "$CPP"], [
AC_MSG_CHECKING([[whether z/OS special settings are required]])
AS_IF([test `uname -s` = "OS/390"],
[
# configure binaries for z/OS
AS_IF([test -z "$CC"],
[CC=`pwd`"/contrib/xcc"
chmod +x $CC || true])
AS_IF([test -z "$CPP"],
CPP="c89 -E")
AC_MSG_RESULT([[yes]])
],
[AC_MSG_RESULT([[no]])]
)
])
AC_MSG_CHECKING([for build type])
AC_ARG_ENABLE([build-type],
[AS_HELP_STRING([[--enable-build-type=TYPE]],
[enable build TYPE, a set of configuration parameters; individual settings ]
[(asserts, sanitizers, compiler and linker flags) can be overridden by ]
[additional configure parameters (debug, debugger, neutral, release, release-compact, ]
[release-hardened) [neutral]])],
[], [enable_build_type=neutral])
AS_IF([test "x${enable_build_type}" = "x"], [enable_build_type="neutral"])
AS_VAR_IF([enable_build_type], ["no"], [enable_build_type="neutral"])
AS_VAR_IF([enable_build_type], ["yes"], [AC_MSG_ERROR([[Missing TYPE for --enable-build-type=]])])
AS_CASE([${enable_build_type}],
[debug], [AC_MSG_RESULT([debug. Defaults: enable asserts, sanitizers (if any supported), debug information, compiler optimisation for debugging])],
[debugger], [AC_MSG_RESULT([debugger. Defaults: enable asserts, disable sanitizers, debug information, no compiler optimisation, static lib])],
[neutral], [AC_MSG_RESULT([neutral. Defaults: use only user-specified compiler and linker flags])],
[release], [AC_MSG_RESULT([release. Defaults: disable asserts, enable compiler optimisations])],
[release-compact], [AC_MSG_RESULT([release-compact. Defaults: disable asserts, enable compiler optimisations for size, enable compact code])],
[release-hardened], [AC_MSG_RESULT([release-hardened. Defaults: disable asserts, enable compiler optimisations, enable linker and compiler hardening])],
[AC_MSG_ERROR([[Unknown build type: ${enable_build_type}]])]
)
AS_VAR_IF([enable_build_type], ["neutral"], [:],
[
# For all non-neutral build types do not use automatic "-g -O2" for CFLAGS
AS_IF([test -z "${CFLAGS}"], [CFLAGS=""])
]
)
AS_VAR_IF([enable_build_type], ["debugger"],
[ # Build only static version unless something else is specified by the user
AS_IF([test -z "${enable_static}" || test "x${enable_static}" = "xyes"],
[
AS_IF([test -z "${enable_shared}"],
[
enable_shared="no"
enable_static="yes"
]
)
],
[
AS_CASE([${enable_static}],[*libmicrohttpd*],
[AS_IF([test -z "${enable_shared}"], [enable_shared="no"])],
)
]
)
]
)
AS_CASE([${enable_build_type}],[debug|debugger],
[ AS_IF([test -z "${enable_silent_rules}"], [ enable_silent_rules="yes" ])]
)
AM_INIT_AUTOMAKE([gnu] [check-news] [filename-length-max=99] [tar-v7] [silent-rules] [subdir-objects])
# Checks for programs.
AC_PROG_AWK
AC_PROG_GREP
AC_PROG_FGREP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_CANONICAL_HOST
m4_version_prereq([2.70],
[
# Find C compiler and compiler options to support
# the latest C standard (C11). Fallback to C99 and C89
# if later C versions are not supported.
AC_PROG_CC
],
[
# Find C compiler and compiler options to support
# the latest C standard (C99). Fallback to C89
# if later C versions are not supported.
AC_PROG_CC_STDC
]
)
# Workaround for libgcrypt
AS_IF([[test "x$lt_sysroot" != "x" && test "x$SYSROOT" = "x"]], [[SYSROOT="$lt_sysroot"]])
user_CFLAGS="$CFLAGS"
user_LDFLAGS="$LDFLAGS"
user_CPPFLAGS="$CPPFLAGS"
CFLAGS_ac=""
LDFLAGS_ac=""
CPPFLAGS_ac=""
MHD_SYS_EXT([CPPFLAGS_ac])
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
m4_version_prereq([2.72],
[
AC_SYS_YEAR2038
],
[
AC_SYS_LARGEFILE
]
)
AC_FUNC_FSEEKO
LT_INIT([win32-dll])
LT_LANG([Windows Resource])
AC_ARG_ENABLE([compact-code],
[AS_HELP_STRING([[--enable-compact-code]],
[enable use of a reduced size version of the code, resulting in smaller ]
[binaries with a slight performance hit [auto]])],
[], [enable_compact_code=auto])
AS_IF([test "x${enable_compact_code}" = "x"], [enable_compact_code="auto"])
AH_TEMPLATE([[MHD_FAVOR_SMALL_CODE]], [Define to '1' to use compact code version])
AH_TEMPLATE([[MHD_FAVOR_FAST_CODE]], [Define to '1' to use fast (and larger) code version])
AS_UNSET([compact_code_MSG])
AS_CASE([${enable_compact_code}], [auto],
[
# Parameter not set.
# Check preprocessor macros
AC_CHECK_DECL([MHD_FAVOR_SMALL_CODE],
[
enable_compact_code="yes"
compact_code_MSG="enabled by preprocessor macro"
],
[],[/* no includes */]
)
AC_CHECK_DECL([MHD_FAVOR_FAST_CODE],
[
AS_VAR_IF([enable_compact_code],["yes"],
[AC_MSG_ERROR([Both MHD_FAVOR_SMALL_CODE and MHD_FAVOR_FAST_CODE macros are defined])]
)
enable_compact_code="no"
compact_code_MSG="set by preprocessor macro"
],[],[/* no includes */]
)
AS_VAR_IF([enable_compact_code], ["auto"],
[
# No preference by preprocessor macros
AC_CACHE_CHECK([whether compiler is configured to optimize for size],
[mhd_cv_cc_optim_size],
[
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM([[
#ifndef __OPTIMIZE_SIZE__
#error Looks like compiler does not optimize for size
choke me now
#endif
]],[])
],
[mhd_cv_cc_optim_size="yes"],[mhd_cv_cc_optim_size="no"]
)
]
)
AS_VAR_IF([mhd_cv_cc_optim_size], ["yes"],
[
enable_compact_code="yes"
compact_code_MSG="enabled automatically as compiler optimizes for size"
AC_DEFINE([MHD_FAVOR_SMALL_CODE],[1])
]
)
]
)
AS_VAR_IF([enable_compact_code], ["auto"],
[
# No preference by preprocessor macros and compiler flags
AS_CASE([${enable_build_type}],[*-compact],
[
enable_compact_code="yes"
compact_code_MSG="enabled by --enable-build-type=${enable_build_type}"
AC_DEFINE([MHD_FAVOR_SMALL_CODE],[1])
]
)
]
)
AS_VAR_IF([enable_compact_code], ["auto"],
[
# No preference
enable_compact_code="no"
compact_code_MSG="by default"
AC_DEFINE([MHD_FAVOR_FAST_CODE],[1])
]
)
],
[yes],
[
compact_code_MSG="enabled by configure parameter"
AC_CHECK_DECL([MHD_FAVOR_SMALL_CODE],
[],
[AC_DEFINE([MHD_FAVOR_SMALL_CODE],[1])],[/* no includes */]
)
AC_CHECK_DECL([MHD_FAVOR_FAST_CODE],
[AC_MSG_ERROR([MHD_FAVOR_FAST_CODE macro is defined, --enable-compact-code could not be used])
],
[],[/* no includes */]
)
],
[no],
[
compact_code_MSG="disabled by configure parameter"
AC_CHECK_DECL([MHD_FAVOR_FAST_CODE],
[],
[AC_DEFINE([MHD_FAVOR_FAST_CODE],[1])],[/* no includes */]
)
AC_CHECK_DECL([MHD_FAVOR_SMALL_CODE],
[AC_MSG_ERROR([MHD_FAVOR_SMALL_CODE macro is defined, --disable-compact-code could not be used])
],
[],[/* no includes */]
)
],
[AC_MSG_ERROR([[Unknown parameter value: --enable-compact-code=${enable_compact_code}]])]
)
AC_MSG_CHECKING([whether to use a reduced size version of the code])
AC_MSG_RESULT([${enable_compact_code} (${compact_code_MSG})])
CFLAGS="${user_CFLAGS}"
# Compiler options to always enable (if supported)
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-fno-strict-aliasing], [-qnoansialias])
# '-qlonglong' is XLC option for C89, not used with C99 or later
MHD_CHECK_ADD_CC_CFLAG([-qlonglong], [CFLAGS_ac])
# Set basic optimisation flags
AS_VAR_IF([enable_build_type],["neutral"],[],
[ # Any non-neutral build types
AC_CACHE_CHECK([whether workarounds for clang or clang-based compiler are required],
[mhd_cv_cc_clang_based],
[
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#if ! defined(__clang__) && ! defined(__llvm__)
#error Compiler is not clang-based
choke me now
#endif
]]
)
],
[mhd_cv_cc_clang_based="yes"],[mhd_cv_cc_clang_based="no"]
)
]
)
]
)
AS_CASE([${enable_build_type}],[debug|debugger],
[ # Debug build or build for walking with debugger
CFLAGS="${user_CFLAGS}"
AS_VAR_IF([enable_build_type],["debug"],
[
# Clang has ASAN (pointer compare) broken when '-Og' optimisations are used
AS_IF([test "x${enable_sanitizers}" != "xno" && test "x${mhd_cv_cc_clang_based}" = "xyes"],
[MHD_CHECK_ADD_CC_CFLAG([-O0], [CFLAGS_ac])],
[MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Og], [-O0])]
)
],
[MHD_CHECK_ADD_CC_CFLAG([-O0], [CFLAGS_ac])]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
]
)
AS_CASE([${enable_build_type}],[release|release-*],
[ # All release types
AS_VAR_IF([enable_build_type],["release-compact"],
[
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
AC_CHECK_DECL([MHD_FAVOR_SMALL_CODE],[],
[AC_CHECK_DECL([MHD_FAVOR_FAST_CODE],[],
[MHD_APPEND_FLAG_TO_VAR([CPPFLAGS_ac],[-DMHD_FAVOR_SMALL_CODE=1])],
[/* no includes */])],[/* no includes */])
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
CFLAGS="${user_CFLAGS}"
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Oz], [-Os], [-O])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
],
[ # All non-compact release types
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
AC_CHECK_DECL([MHD_FAVOR_SMALL_CODE],[],
[AC_CHECK_DECL([MHD_FAVOR_FAST_CODE],[],
[MHD_APPEND_FLAG_TO_VAR([CPPFLAGS_ac],[-DMHD_FAVOR_FAST_CODE=1])],
[/* no includes */])],[/* no includes */])
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
CFLAGS="${user_CFLAGS}"
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-O2], [-O])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
]
)
]
)
AS_VAR_IF([enable_build_type],["neutral"],[],
[ # Any non-neutral build types
MHD_CHECK_ADD_CC_CFLAGS([-Wall -Wnull-dereference], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wdeclaration-after-statement -Wimplicit -Wnested-externs], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wredundant-decls -Wtrampolines -Wunsafe-loop-optimizations], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wpoison-system-directories], [CFLAGS_ac])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${user_LDFLAGS}"
MHD_CHECK_ADD_CC_LDFLAG([-Wl,--warn-common], [LDFLAGS_ac])
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
AS_CASE([${enable_build_type}],[debug|debugger],
[ # Debug build or build for walking with debugger
CFLAGS="${user_CFLAGS}"
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-ggdb3], [-g3], [-ggdb], [-g])
MHD_CHECK_ADD_CC_CFLAGS([-Wextra -Wdouble-promotion], [CFLAGS_ac])
MHD_FIND_ADD_CC_CFLAG_IFELSE(
[
# clang produce warning when string pointer is used as a format specifier for v*printf() function
AS_VAR_IF([mhd_cv_cc_clang_based],["yes"],[MHD_CHECK_ADD_CC_CFLAG([-Wno-format-nonliteral], [CFLAGS_ac])])
],[],
[CFLAGS_ac], [-Wformat=2], [-Wformat]
)
MHD_CHECK_ADD_CC_CFLAGS([-Wformat-overflow -Wformat-truncation -Wformat-security -Wformat-signedness], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wmissing-include-dirs -Wshift-overflow=2 -Wstringop-overflow=4 -Walloc-zero], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wduplicated-branches -Wduplicated-cond -Wfloat-equal -Wshadow -Wpointer-arith], [CFLAGS_ac])
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wshadow-all], [-Wshadow])
MHD_CHECK_ADD_CC_CFLAGS([-Wbad-function-cast -Wcast-qual -Wwrite-strings -Wconversion], [CFLAGS_ac])
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wcast-align=strict], [-Wcast-align])
MHD_CHECK_ADD_CC_CFLAGS([-Wjump-misses-init -Wlogical-op -Waggregate-return -Wstrict-prototypes], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wold-style-definition -Wmissing-declarations -Wmissing-prototypes], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wuninitialized -Winit-self -Wshift-negative-value -Wswitch-enum], [CFLAGS_ac])
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wstrict-overflow=4], [-Wstrict-overflow])
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wnormalized=nfkc], [-Wnormalized])
MHD_CHECK_ADD_CC_CFLAGS([-Walloca -Wbidi-chars=any -Warray-bounds -Wpacked -Wvariadic-macros], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wundef], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wanon-enum-enum-conversion -Warray-bounds-pointer-arithmetic -Wassign-enum], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wbit-int-extension -Wbitfield-enum-conversion -Wparentheses -Wbool-operation], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wcast-function-type -Wcomma -Wcomment -Wcompound-token-split], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wconditional-uninitialized -Wdeprecated], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wdocumentation-pedantic -Wempty-init-stmt -Wenum-conversion -Wexpansion-to-defined], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wflexible-array-extensions -Wloop-analysis -Wformat-pedantic], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wformat-type-confusion -Wfour-char-constants], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wgcc-compat -Wgnu-anonymous-struct -Wgnu-compound-literal-initializer], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-conditional-omitted-operand -Wgnu-designator -Wgnu-empty-initializer], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-empty-struct -Wgnu-flexible-array-initializer -Wgnu-folding-constant], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-null-pointer-arithmetic -Wgnu-pointer-arith -Wgnu-redeclared-enum], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-union-cast -Wgnu-variable-sized-type-not-at-end -Widiomatic-parentheses], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wmissing-noreturn -Wmissing-variable-declarations -Wnested-anon-types], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wnewline-eof -Wover-aligned -Wredundant-parens], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wshift-sign-overflow -Wtautological-compare -Wunaligned-access], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wunused -Wzero-as-null-pointer-constant -Wzero-length-array], [CFLAGS_ac])
MHD_CHECK_CC_CFLAG([-Wused-but-marked-unused],[CFLAGS_ac],
[
AC_CACHE_CHECK([whether $[]CC -Wused-but-marked-unused works with system headers],
[mhd_cv_wused_but_marked_unused_sys_header],
[
SAVE_ac_c_werror_flag="$ac_c_werror_flag"
ac_c_werror_flag="yes"
CFLAGS="${CFLAGS_ac} -Wused-but-marked-unused ${user_CFLAGS}"
AC_COMPILE_IFELSE(
[
AC_LANG_SOURCE([[
#include <stdio.h>
int main(void)
{
char buf[16];
return (int) snprintf(buf, 16, "test");
}
]]
)
],
[mhd_cv_wused_but_marked_unused_sys_header="yes"],
[mhd_cv_wused_but_marked_unused_sys_header="no"]
)
ac_c_werror_flag="$SAVE_ac_c_werror_flag"
]
)
AS_VAR_IF([mhd_cv_wused_but_marked_unused_sys_header],["yes"],
[MHD_APPEND_FLAG_TO_VAR([CFLAGS_ac],[-Wused-but-marked-unused])]
)
]
)
#
# Removed flags:
#
# -Wdisabled-macro-expansion - warns about macros from system headers
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${user_LDFLAGS}"
MHD_CHECK_ADD_CC_LDFLAG([-Wl,--enable-long-section-names], [LDFLAGS_ac])
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
AS_CASE([${enable_build_type}],[release|release-*],
[ # All release types
CFLAGS="${user_CFLAGS}"
AS_VAR_IF([enable_build_type],["release-compact"],
[],
[ # All non-compact release types
MHD_CHECK_ADD_CC_CFLAGS([-fsched-pressure -fira-loop-pressure -fmerge-all-constants], [CFLAGS_ac]) # These flags may improve size, recheck with LTO and linker garbage collection
MHD_CHECK_ADD_CC_CFLAGS([-ftree-partial-pre -fgcse-after-reload -fipa-pta], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-fisolate-erroneous-paths-attribute -ffinite-loops -floop-nest-optimize], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-fpredictive-commoning -frename-registers], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-ftree-loop-distribute-patterns -fpeel-loops -fsplit-loops -ftree-vectorize], [CFLAGS_ac])
]
)
AS_VAR_IF([enable_build_type],["release-hardened"],
[
MHD_CHECK_ADD_CC_CFLAGS([-Wformat-security -Wstack-protector], [CFLAGS_ac])
MHD_CHECK_ADD_CC_CFLAGS([-Wuninitialized -Winit-self -Walloc-zero -Wbidi-chars=any], [CFLAGS_ac])
]
)
AS_VAR_IF([enable_build_type],["release"],
[ # Flags are not suitable for 'compact' and for 'hardened'
MHD_CHECK_ADD_CC_CFLAGS([-ffast-math -fno-trapping-math], [CFLAGS_ac])
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
# W32-specific
LDFLAGS="${user_LDFLAGS}"
MHD_CHECK_ADD_CC_LDFLAG([-Wl,--disable-long-section-names], [LDFLAGS_ac])
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
# Additional flags are checked and added at the end of 'configure'
# Check for headers that are ALWAYS required
AC_CHECK_HEADERS_ONCE([stdio.h string.h stdint.h errno.h limits.h fcntl.h], [],
[AC_MSG_ERROR([Compiling libmicrohttpd requires standard POSIX headers files])], [AC_INCLUDES_DEFAULT])
# Check for basic optional headers
AC_CHECK_HEADERS([stddef.h stdlib.h inttypes.h sys/types.h sys/stat.h unistd.h \
sys/uio.h], [], [], [AC_INCLUDES_DEFAULT])
# Check for clock-specific optional headers
AC_CHECK_HEADERS([sys/time.h time.h], [], [], [AC_INCLUDES_DEFAULT])
# Check for system information and parameters optional headers
AC_CHECK_HEADERS([endian.h machine/endian.h sys/endian.h sys/byteorder.h \
sys/machine.h machine/param.h sys/param.h sys/isa_defs.h \
sys/ioctl.h], [], [], [AC_INCLUDES_DEFAULT])
# Check for network and sockets optional headers
AC_CHECK_HEADERS([sys/socket.h sys/select.h netinet/in_systm.h netinet/in.h \
arpa/inet.h netinet/ip.h netinet/tcp.h net/if.h \
netdb.h sockLib.h inetLib.h], [], [],
[AC_INCLUDES_DEFAULT
[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif /* HAVE_INTTYPES_H */
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif /* HAVE_SYS_SOCKET_H */
#ifdef HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif /* HAVE_NETINET_IN_SYSTM_H */
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif /* HAVE_NETINET_IN_H */
#ifdef HAVE_NETINET_IP_H
#include <netinet/ip.h>
#endif /* HAVE_NETINET_IP_H */
#ifdef HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
#endif /* HAVE_NETINET_TCP_H */
]]
)
# Check for other optional headers
AC_CHECK_HEADERS([sys/msg.h sys/mman.h signal.h], [], [], [AC_INCLUDES_DEFAULT])
AC_CHECK_HEADER([[search.h]],
[
MHD_CHECK_LINK_RUN([[for proper tsearch(), tfind() and tdelete()]],[[mhd_cv_sys_tsearch_usable]],
[
AS_CASE([$host_os],
[openbsd*],
[[ # Some OpenBSD versions have wrong return value for tdelete()
mhd_cv_sys_tsearch_usable='assuming no'
]],
[netbsd*],
[[ # NetBSD had leaked root node for years
mhd_cv_sys_tsearch_usable='assuming no'
]],
[[mhd_cv_sys_tsearch_usable='assuming yes']]
)
],
[
AC_LANG_SOURCE(
[[
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif /* HAVE_STDDEF_H */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif /* HAVE_STDLIB_H */
#include <stdio.h>
#include <search.h>
static int cmp_func(const void *p1, const void *p2)
{
return (*((const int *)p1)) - (*((const int *)p2));
}
int main(void)
{
int ret = 0;
void *root_ptr = NULL;
int element1 = 1;
int **element_ptr_ptr1;
int **element_ptr_ptr2;
element_ptr_ptr1 =
(int **) tsearch ((void*) &element1, &root_ptr, &cmp_func);
if (NULL == element_ptr_ptr1)
{
fprintf (stderr, "NULL pointer has been returned when tsearch() called for the first time.\n");
return ++ret;
}
if (*element_ptr_ptr1 != &element1)
{
fprintf (stderr, "Wrong pointer has been returned when tsearch() called for the first time.\n");
return ++ret;
}
if (NULL == root_ptr)
{
fprintf (stderr, "Root pointer has not been set by tsearch().\n");
return ++ret;
}
element_ptr_ptr2 =
(int **) tsearch ((void*) &element1, &root_ptr, &cmp_func);
if (NULL == element_ptr_ptr2)
{
fprintf (stderr, "NULL pointer has been returned when tsearch() called for the second time.\n");
return ++ret;
}
if (*element_ptr_ptr2 != &element1)
{
fprintf (stderr, "Wrong pointer has been returned when tsearch() called for the second time.\n");
++ret;
}
if (element_ptr_ptr2 != element_ptr_ptr1)
{
fprintf (stderr, "Wrong element has been returned when tsearch() called for the second time.\n");
++ret;
}
element_ptr_ptr2 =
(int **) tfind ((void*) &element1, &root_ptr, &cmp_func);
if (NULL == element_ptr_ptr2)
{
fprintf (stderr, "NULL pointer has been returned by tfind().\n");
++ret;
}
if (*element_ptr_ptr2 != &element1)
{
fprintf (stderr, "Wrong pointer has been returned when by tfind().\n");
++ret;
}
if (element_ptr_ptr2 != element_ptr_ptr1)
{
fprintf (stderr, "Wrong element has been returned when tsearch() called for the second time.\n");
++ret;
}
element_ptr_ptr1 =
(int **) tdelete ((void*) &element1, &root_ptr, &cmp_func);
if (NULL == element_ptr_ptr1)
{
fprintf (stderr, "NULL pointer has been returned by tdelete().\n");
++ret;
}
if (NULL != root_ptr)
{
fprintf (stderr, "Root pointer has not been set to NULL by tdelete().\n");
++ret;
}
return ret;
}
]]
)
],
[AC_DEFINE([[MHD_USE_SYS_TSEARCH]], [[1]], [Define to 1 if you have properly working tsearch(), tfind() and tdelete() functions.])]
)
],
[], [AC_INCLUDES_DEFAULT]
)
AM_CONDITIONAL([MHD_USE_SYS_TSEARCH], [[test "x$mhd_cv_sys_tsearch_usable" = "xyes" || test "x$mhd_cv_sys_tsearch_usable" = "xassuming yes"]])
# Optional headers used for tests
AC_CHECK_HEADERS([sys/sysctl.h netinet/ip_icmp.h netinet/icmp_var.h], [], [],
[[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif /* HAVE_SYS_SYSCTL_H */
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif /* HAVE_SYS_SOCKET_H */
#ifdef HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif /* HAVE_NETINET_IN_SYSTM_H */
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif /* HAVE_NETINET_IN_H */
#ifdef HAVE_NETINET_IP_H
#include <netinet/ip.h>
#endif /* HAVE_NETINET_IP_H */
#ifdef HAVE_NETINET_IP_ICMP_H
#include <netinet/ip_icmp.h>
#endif /* HAVE_NETINET_IP_ICMP_H */
]]
)
AC_ARG_ENABLE([compiler-hardening],
[AS_HELP_STRING([--enable-compiler-hardening], [enable compiler security checks])],
[],
[AS_CASE([${enable_build_type}],[*-hardened],
[enable_compiler_hardening='yes'],[enable_compiler_hardening='no'])]
)
AS_VAR_IF([enable_compiler_hardening],["yes"],
[
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
AC_CHECK_DECL([_FORTIFY_SOURCE],
[MHD_APPEND_FLAG_TO_VAR([CPPFLAGS_ac],[-U_FORTIFY_SOURCE])],
[],[/* no includes */])
MHD_APPEND_FLAG_TO_VAR([CPPFLAGS_ac],[-D_FORTIFY_SOURCE=2])
CPPFLAGS="${CPPFLAGS_ac} ${user_CPPFLAGS}"
CFLAGS="${user_CFLAGS}"
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac],[-fstack-protector-strong],[-fstack-protector-all],[-fstack-protector])
MHD_CHECK_ADD_CC_CFLAGS([-fstack-clash-protection],[CFLAGS_ac])
MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac],[-ftrivial-auto-var-init=pattern],[-ftrivial-auto-var-init=zero])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
AS_IF([test "x${enable_static}" = "xyes" && test "x${pic_mode}" != "xyes"],
[
# PIE static lib can be used within non-PIE application, but
# PIE static lib cannot be used in non-PIE shared lib. Let's assume
# that static lib will not be used in shared lib
# All "pie" flags will be used automatically by libtool only
# for static library objects.
CFLAGS="${user_CFLAGS}"
# Perform tests here with "-pie" enabled
LDFLAGS="${LDFLAGS_ac} -pie ${user_LDFLAGS}"
MHD_CHECK_ADD_CC_CFLAG([-fPIE],[CFLAGS_ac],
[
MHD_APPEND_FLAG_TO_VAR([LDFLAGS_ac],[-pie])
],
[
MHD_CHECK_ADD_CC_CFLAG([-fpie],[CFLAGS_ac],
[
MHD_APPEND_FLAG_TO_VAR([LDFLAGS_ac],[-pie])
]
)
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
# Linker hardening options
# Currently these options are ELF specific, they don't work on Darwin and W32
AC_ARG_ENABLE([linker-hardening],
[AS_HELP_STRING([--enable-linker-hardening], [enable linker security fixups])],
[],
[AS_CASE([${enable_build_type}],[*-hardened],
[enable_linker_hardening='yes'],[enable_linker_hardening='no'])]
)
AS_VAR_IF([enable_linker_hardening],["yes"],
[
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
LDFLAGS="${user_LDFLAGS}"
MHD_CHECK_ADD_CC_LDFLAG([-Wl,-z,relro],[LDFLAGS_ac],
[MHD_CHECK_ADD_CC_LDFLAG([-Wl,-z,now],[LDFLAGS_ac])])
# Actually should be "noexec" by default, but let's try to enforce it.
MHD_CHECK_ADD_CC_LDFLAG([-Wl,-z,noexecstack],[LDFLAGS_ac])
# W32-specific. Some are enabled by default, but they will be enfored to be sure.
MHD_CHECK_ADD_CC_LDFLAGS([-Wl,--large-address-aware -Wl,--enable-auto-image-base],[LDFLAGS_ac])
MHD_CHECK_ADD_CC_LDFLAGS([-Wl,--dynamicbase -Wl,--nxcompat -Wl,--high-entropy-va],[LDFLAGS_ac])
LDFLAGS="${LDFLAGS_ac} ${user_LDFLAGS}"
]
)
MHD_BOOL
AX_CHECK_COMPILE_FLAG([[-Werror=attributes]],
[
AC_MSG_CHECKING([[whether -Werror=attributes actually works]])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS} -Werror=attributes"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[__attribute__((non_existing_attrb_dummy)) static int SimpleFunc(void) {return 3;}]],
[[int r = SimpleFunc(); if (r) return r;]])],
[
AC_MSG_RESULT([[no]])
errattr_CFLAGS=""
], [
AC_MSG_RESULT([[yes]])
errattr_CFLAGS="-Werror=attributes"
])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
],
[[errattr_CFLAGS=""]], [], [])
AC_MSG_CHECKING([[for function inline keywords supported by $CC]])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS} $errattr_CFLAGS"
inln_prfx="none"
# Prefer always inline functions
for inln_prfx_chk in InlineWithAttr __forceinline inline __inline__ __inline _inline _Inline
do
# Try to link to avoid "symbol undefined" problems at build time
AS_IF([[test "x$inln_prfx_chk" = "xInlineWithAttr"]],
[
AS_IF([[test "x$errattr_CFLAGS" = "x"]],
[[ # Skip test with attribute as negative result can't be detected
inln_prfx_chk="__forceinline" # use next value
]],[[inln_prfx_chk="inline __attribute__((always_inline))"]])
])
AC_LINK_IFELSE(
[
AC_LANG_PROGRAM(
[[
#ifdef __cplusplus
#error This test is only for C.
choke me
#endif
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#endif
static $inln_prfx_chk bool cmpfn(int x, int y)
{ return x > y; }
static $inln_prfx_chk int sumfn(int x, int y)
{ return x + y; }
]],[[
int a = 1, b = 100, c;
if (cmpfn(a, b))
c = sumfn(a, b);
else
c = 0 - sumfn(a, b);
if (c)
return 0;
]])
],
[[ inln_prfx="$inln_prfx_chk" ]])
test "x$inln_prfx" != "xnone" && break
done
AS_IF([[test "x$inln_prfx" != "xnone"]],
[
AC_DEFINE([INLINE_FUNC],[1],[Define to 1 if your C compiler supports inline functions.])
AC_DEFINE_UNQUOTED([_MHD_static_inline],[static $inln_prfx],[Define to prefix which will be used with MHD static inline functions.])
], [
AC_DEFINE([_MHD_static_inline],[static],[Define to prefix which will be used with MHD static inline functions.])
])
AC_MSG_RESULT([[$inln_prfx]])
CFLAGS="${CFLAGS_ac} ${user_CFLAGS}"
AC_CHECK_HEADERS([stdalign.h], [], [], [AC_INCLUDES_DEFAULT])
AC_CACHE_CHECK([[for C11 'alignof()' support]], [[mhd_cv_c_alignof]],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#ifdef HAVE_STDALIGN_H
#include <stdalign.h>
#endif
]], [[
int var1[(alignof(int) >= 2) ? 1 : -1];
int var2[alignof(unsigned int) - 1];
int var3[(alignof(char) > 0) ? 1 : -1];
int var4[(alignof(long) >= 4) ? 1 : -1];
/* Mute compiler warnings */
var1[0] = var2[0] = var3[0] = 0;
var4[0] = 1;
if (var1[0] + var2[0] + var3[0] == var4[0])
return 1;
]])
], [
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#ifdef HAVE_STDALIGN_H
#include <stdalign.h>
#endif
]], [[
/* Should fail if 'alignof()' works */
int var1[alignof(nonexisting_type) - 1];
/* Mute compiler warnings */
var1[0] = 1;
if (var1[0] + 1 == 1)
return 1;
]])
], [[mhd_cv_c_alignof='no']], [[mhd_cv_c_alignof='yes']])
], [[mhd_cv_c_alignof='no']])
])
AS_VAR_IF([mhd_cv_c_alignof], ["yes"],
[AC_DEFINE([[HAVE_C_ALIGNOF]], [1], [Define to 1 if your compiler supports 'alignof()'])])
# Check system type
AC_MSG_CHECKING([[for target host OS]])
os_is_windows="no"
os_is_native_w32="no"
AS_CASE(["$host_os"],
[*darwin* | *rhapsody* | *macosx*],
[AC_DEFINE([OSX],[1],[This is an OS X system])
mhd_host_os='Darwin'
AC_MSG_RESULT([[$mhd_host_os]])],
[kfreebsd*-gnu],
[AC_DEFINE([SOMEBSD],[1],[This is a BSD system])
AC_DEFINE([FREEBSD],[1],[This is a FreeBSD system])
mhd_host_os='FreeBSD kernel with GNU userland'
AC_MSG_RESULT([[$mhd_host_os]])],
[freebsd*],
[AC_DEFINE([SOMEBSD],[1],[This is a BSD system])
AC_DEFINE([FREEBSD],[1],[This is a FreeBSD system])
mhd_host_os='FreeBSD'
AC_MSG_RESULT([[$mhd_host_os]])],
[openbsd*],
[AC_DEFINE([SOMEBSD],[1],[This is a BSD system])
AC_DEFINE([OPENBSD],[1],[This is an OpenBSD system])
mhd_host_os='OpenBSD'
AC_MSG_RESULT([[$mhd_host_os]])],
[netbsd*],
[AC_DEFINE([SOMEBSD],[1],[This is a BSD system])
AC_DEFINE([NETBSD],[1],[This is a NetBSD system])
mhd_host_os='NetBSD'
AC_MSG_RESULT([[$mhd_host_os]])],
[*solaris*],
[AC_DEFINE([SOLARIS],[1],[This is a Solaris system])
AC_DEFINE([_REENTRANT],[1],[Need with solaris or errno does not work])
mhd_host_os='Solaris'
AC_MSG_RESULT([[$mhd_host_os]])],
[linux-gnu],
[AC_DEFINE([LINUX],[1],[This is a Linux kernel])
mhd_host_os='GNU/Linux'
AC_MSG_RESULT([[$mhd_host_os]])],
[linux-android*],
[AC_DEFINE([LINUX],[1],[This is a Linux kernel])
mhd_host_os='Android'
AC_MSG_RESULT([[$mhd_host_os]])],
[*linux*],
[AC_DEFINE([LINUX],[1],[This is a Linux kernel])
mhd_host_os='Linux'
AC_MSG_RESULT([[$mhd_host_os]])],
[*cygwin*],
[AC_DEFINE([CYGWIN],[1],[This is a Cygwin system])
mhd_host_os='Windows/Cygwin'
AC_MSG_RESULT([[$mhd_host_os]])
os_is_windows="yes"],
[*mingw*],
[
AC_DEFINE([MINGW],[1],[This is a MinGW system])
AC_DEFINE([WINDOWS],[1],[This is a Windows system])
mhd_host_os='Windows/MinGW'
AC_MSG_RESULT([[$mhd_host_os]])
AC_CHECK_HEADERS([winsock2.h ws2tcpip.h], [], [AC_MSG_ERROR([[Winsock2 headers are required for W32]])], [AC_INCLUDES_DEFAULT])
AC_CACHE_CHECK([for MS lib utility], [ac_cv_use_ms_lib_tool],
[mslibcheck=`lib 2>&1`
AS_IF([echo "$mslibcheck" | $GREP -e '^Microsoft (R) Library Manager' - >/dev/null],
[ac_cv_use_ms_lib_tool=yes],
[ac_cv_use_ms_lib_tool=no])
])
AS_IF([test "x$ac_cv_use_ms_lib_tool" = "xyes"],
[AC_SUBST([MS_LIB_TOOL], [[lib]])])
AC_SUBST([lt_cv_objdir])
os_is_windows="yes"
os_is_native_w32="yes"
],
[*openedition*],
[AC_DEFINE([OS390],[1],[This is a OS/390 system])
mhd_host_os='OS/390'
AC_MSG_RESULT([[$mhd_host_os]])],
[gnu*],
[AC_DEFINE([[GNU_HURD]], [[1]], [Define to `1' if host machine runs on GNU Hurd.])
mhd_host_os='GNU Hurd'
AC_MSG_RESULT([[$mhd_host_os]])
],
[
AC_MSG_RESULT([unrecognised OS])
mhd_host_os="${host_os}"
AC_MSG_WARN([Unrecognised OS $host_os])
AC_DEFINE([OTHEROS],1,[Some strange OS])
])
AM_CONDITIONAL([CYGWIN_TARGET], [[test "x$os_is_windows" = "xyes" && \
test "x${os_is_native_w32}" != "xyes"]])
AS_VAR_IF([os_is_windows], ["yes"],
[
AC_MSG_CHECKING([[whether target W32 version is specified by precompiler defines]])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
/* Note: check logic is reversed for easy log reading */
#ifdef WINVER
#error WINVER is defined
choke me now;
#endif
#ifdef _WIN32_WINNT
#error _WIN32_WINNT is defined
choke me now;
#endif
#ifdef NTDDI
#error NTDDI is defined
choke me now;
#endif
]],[[(void)0]])
], [[mhd_w32_ver_preselect=no]], [[mhd_w32_ver_preselect=yes]]
)
AC_MSG_RESULT([[${mhd_w32_ver_preselect}]])
AC_CHECK_HEADERS([windows.h sdkddkver.h], [], [], [AC_INCLUDES_DEFAULT])
AS_VAR_IF([mhd_w32_ver_preselect],["yes"],
[
AC_MSG_CHECKING([[for specified target W32 version]])
AS_UNSET([[mhd_w32_ver]])
AS_UNSET([[mhd_w32_ver_msg]])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if _WIN32_WINNT+0 < 0x0501
/* Check before headers inclusion */
#error _WIN32_WINNT is less than 0x0501
choke me now;
#endif