move ddcutil.pc installation to subdirectory data

for some undetermined reason, it was not longer being installed by
top level Makefile

Makefile.am

@@ -30,37 +30,11 @@ DISTCHECK_CONFIGURE_FLAGS = --enable-introspection
 # endif
 EXTRA_DIST += m4/introspection.m4 
 
+# install-data-local:
+#	@echo "(Makefile) install-data-local):"
+#	@echo "  docdir                 = $(docdir)"
 
-# The proper location for pkgconfig files is ambiguous, and the 
-# subject of much discussion.  .
-# However, it appears that: 
-#   - /usr/lib64/pkgconfig should hold x64 specific pkgconfig files
-#   - /usr/lib/pkgconfig should hold i386 specific pkgconfig files
-#   - /usr/share/pkgconfig should hold architecture agnostic pkgconfig files
-#
-# The tail wags the dog. libddcutil-dev can contain
-#   usr/*/pkgconfig
-# or 
-#   usr/lib/x86_64-linux-gnu/pkgconfig
-# but there's no way to "or" these two statements. 
-#
-# When building on OBS, the same libddcutil-dev.install is used for all (Debian based) builds, 
-# and if using $(libdir) the location of ddcutil.pc will depend on platform, e.g. 
-# some times it will be /usr/lib/x86_64-linux-gnu/pkgconfig, sometimes something else. 
-# 
-# Note the the entry for ddcutil.pc in the Debian .install file needs
-# to be kept in sync with where autotools puts the files.
-
-install-data-local:
-	@echo "(Makefile) install-data-local):"
-	@echo "  docdir                 = $(docdir)"
-
-	pkgconfigdir=${libdir}/pkgconfig
 if ENABLE_SHARED_LIB_COND
-if !INSTALL_LIB_ONLY_COND
-	pkgconfig_DATA=ddcutil.pc
-endif
-
   libddcdocdir = $(datarootdir)/doc/libddcutil
 # libddcdoc_DATA = AUTHORS
 endif

configure.ac

@@ -87,7 +87,8 @@ AC_CONFIG_FILES([
 	docs/Makefile
 	docs/doxygen/Makefile
 	src/public/ddcutil_macros.h
-   ddcutil.pc
+    ddcutil.pc
+    data/ddcutil.pc
   ],
  )
 dnl AC_CONFIG_FILES(package/upload_obsrpm, [chmod +x package/upload_obsrpm] )

data/Makefile.am

@@ -3,6 +3,28 @@
 # Copyright (C) 2016-2023 Sanford Rockowitz <rockowitz@minsoft.com>
 # SPDX-License-Identifier: GPL-2.0-or-later
 
+# The proper location for pkgconfig files is ambiguous, and the 
+# subject of much discussion.  .
+# However, it appears that: 
+#   - /usr/lib64/pkgconfig should hold x64 specific pkgconfig files
+#   - /usr/lib/pkgconfig should hold i386 specific pkgconfig files
+#   - /usr/share/pkgconfig should hold architecture agnostic pkgconfig files
+#
+# The tail wags the dog. libddcutil-dev can contain
+#   usr/*/pkgconfig
+# or 
+#   usr/lib/x86_64-linux-gnu/pkgconfig
+# but there's no way to "or" these two statements. 
+#
+# When building on OBS, the same libddcutil-dev.install is used for all (Debian based) builds, 
+# and if using $(libdir) the location of ddcutil.pc will depend on platform, e.g. 
+# some times it will be /usr/lib/x86_64-linux-gnu/pkgconfig, sometimes something else. 
+# 
+# Note the the entry for ddcutil.pc in the Debian .install file needs
+# to be kept in sync with where autotools puts the files.
+
+
+
 resfiles = \
 	etc/modprobe.d/nvidia-i2c.conf \
 	etc/udev/rules.d/60-ddcutil-i2c.rules \
@@ -21,16 +43,22 @@ installed_modulesfiles = \
     usr/lib/modules-load.d/ddcutil.conf
 endif 
 
-# Causes files (with directory structure) to be included in tarball:
-EXTRA_DIST = $(resfiles) $(rulesfiles) $(distributed_modulesfiles)
+pkgconfigfiles = \
+    ddcutil.pc
 
+# Causes files (with directory structure) to be included in tarball:
+EXTRA_DIST = $(resfiles) $(rulesfiles) $(distributed_modulesfiles) ddcutil.pc.in
 
+# Target directory
+pkgconfigdir = ${libdir}/pkgconfig
+
 # Target directory (/usr/local/share/ddcutil/data or /usr/share/ddcutil/data):
 ddcutildir = $(datadir)/ddcutil/data
 # Causes files (w/o directory structure) to be installed in target directory:
 
 if !INSTALL_LIB_ONLY_COND
 ddcutil_DATA = $(resfiles)
+pkgconfig_DATA = ddcutil.pc
 endif
 
 # Use prefix instead of libdir here because it appears that