CMakeLists.txt: Make libnsl optional #255
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dang
reviewed
Sep 7, 2022
| @@ -197,13 +197,13 @@ set(SYSTEM_LIBRARIES | |||
| ${SYSTEM_LIBRARIES} | |||
| ) | |||
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|
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| if (NOT BSDBASED) | |||
| if (USE_LIBNSL) | |||
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You need to also have an option() call. See USE_LTTNG or USE_PROFILE. You also need to have a conditional define in config-h.in.cmake for YP, which is set when this is enabled. However, it looks like YP is never defined anywhere, so maybe this is all dead code. Unfortunately, I can't fully test, since on Fedora, sudo depends on libnsl2, so I cannot remove it from my system.
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It is not dead code. If USE_LIBNSL(functionality) is used but the dependency is not available linking will fail. I will update the review as per your recommendation.
Although indeed there seems to be some dead code laying around. I had a patch removing it but wanted to have some feedback. Also keep in mind that some code is not built but function prototypes are provided in the library. Dead code on ntirpc build but not at the symbol level.
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I can't find any place where NSL is used that's not protected by YP, which is never defined. Can you point at the code that fails to link? As I said, I can't remove libnsl, so I can't find this myself.
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I have it on a cross compiled environment so i can see it getting my host library and failing to link:
[54/56] : && /home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gcc -fPIC -march=armv5te -marm -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot -O2 -pipe -g -feliminate-unused-debug-types -fmacro-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot= -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native= -fPIC -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fmacro-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot= -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native= -Wl,-z,relro,-z,now -Wl,--version-script=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/ntirpc-4.0/libntirpc.map -shared -Wl,-soname,libntirpc.so.4.0 -o src/libntirpc.so.4.0 src/CMakeFiles/ntirpc.dir/auth_none.c.o src/CMakeFiles/ntirpc.dir/auth_unix.c.o src/CMakeFiles/ntirpc.dir/authunix_prot.c.o src/CMakeFiles/ntirpc.dir/bindresvport.c.o src/CMakeFiles/ntirpc.dir/bsd_epoll.c.o src/CMakeFiles/ntirpc.dir/city.c.o src/CMakeFiles/ntirpc.dir/clnt_bcast.c.o src/CMakeFiles/ntirpc.dir/clnt_dg.c.o src/CMakeFiles/ntirpc.dir/clnt_generic.c.o src/CMakeFiles/ntirpc.dir/clnt_perror.c.o src/CMakeFiles/ntirpc.dir/clnt_raw.c.o src/CMakeFiles/ntirpc.dir/clnt_simple.c.o src/CMakeFiles/ntirpc.dir/clnt_vc.c.o src/CMakeFiles/ntirpc.dir/getnetconfig.c.o src/CMakeFiles/ntirpc.dir/getnetpath.c.o src/CMakeFiles/ntirpc.dir/getpeereid.c.o src/CMakeFiles/ntirpc.dir/getrpcent.c.o src/CMakeFiles/ntirpc.dir/mt_misc.c.o src/CMakeFiles/ntirpc.dir/pmap_prot.c.o src/CMakeFiles/ntirpc.dir/pmap_prot2.c.o src/CMakeFiles/ntirpc.dir/pmap_rmt.c.o src/CMakeFiles/ntirpc.dir/rbtree.c.o src/CMakeFiles/ntirpc.dir/rbtree_x.c.o src/CMakeFiles/ntirpc.dir/rpc_prot.c.o src/CMakeFiles/ntirpc.dir/rpc_callmsg.c.o src/CMakeFiles/ntirpc.dir/rpc_commondata.c.o src/CMakeFiles/ntirpc.dir/rpc_crc32.c.o src/CMakeFiles/ntirpc.dir/rpc_dplx_msg.c.o src/CMakeFiles/ntirpc.dir/rpc_dtablesize.c.o src/CMakeFiles/ntirpc.dir/rpc_generic.c.o src/CMakeFiles/ntirpc.dir/rpcb_clnt.c.o src/CMakeFiles/ntirpc.dir/rpcb_prot.c.o src/CMakeFiles/ntirpc.dir/rpcb_st_xdr.c.o src/CMakeFiles/ntirpc.dir/strlcpy.c.o src/CMakeFiles/ntirpc.dir/svc.c.o src/CMakeFiles/ntirpc.dir/svc_auth.c.o src/CMakeFiles/ntirpc.dir/svc_auth_unix.c.o src/CMakeFiles/ntirpc.dir/svc_auth_none.c.o src/CMakeFiles/ntirpc.dir/svc_dg.c.o src/CMakeFiles/ntirpc.dir/svc_generic.c.o src/CMakeFiles/ntirpc.dir/svc_raw.c.o src/CMakeFiles/ntirpc.dir/svc_rqst.c.o src/CMakeFiles/ntirpc.dir/svc_simple.c.o src/CMakeFiles/ntirpc.dir/svc_vc.c.o src/CMakeFiles/ntirpc.dir/svc_xprt.c.o src/CMakeFiles/ntirpc.dir/xdr.c.o src/CMakeFiles/ntirpc.dir/xdr_float.c.o src/CMakeFiles/ntirpc.dir/xdr_mem.c.o src/CMakeFiles/ntirpc.dir/xdr_reference.c.o src/CMakeFiles/ntirpc.dir/xdr_ioq.c.o src/CMakeFiles/ntirpc.dir/svc_ioq.c.o src/CMakeFiles/ntirpc.dir/work_pool.c.o -Wl,-rpath,/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native/usr/lib: -latomic -lurcu-bp /home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native/usr/lib/libnsl.so && :
| FAILED: src/libntirpc.so.4.0
No problem. I attempting to fix the issues with YP not being defined as well as making it a drop-in replacement for libtirpc.
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I have it on a cross compiled environment so i can see it getting my host library and failing to link:
[54/56] : && /home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gcc -fPIC -march=armv5te -marm -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot -O2 -pipe -g -feliminate-unused-debug-types -fmacro-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot= -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native= -fPIC -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fmacro-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0=/usr/src/debug/ntirpc/4.0-r0 -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot= -fdebug-prefix-map=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native= -Wl,-z,relro,-z,now -Wl,--version-script=/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/ntirpc-4.0/libntirpc.map -shared -Wl,-soname,libntirpc.so.4.0 -o src/libntirpc.so.4.0 src/CMakeFiles/ntirpc.dir/auth_none.c.o src/CMakeFiles/ntirpc.dir/auth_unix.c.o src/CMakeFiles/ntirpc.dir/authunix_prot.c.o src/CMakeFiles/ntirpc.dir/bindresvport.c.o src/CMakeFiles/ntirpc.dir/bsd_epoll.c.o src/CMakeFiles/ntirpc.dir/city.c.o src/CMakeFiles/ntirpc.dir/clnt_bcast.c.o src/CMakeFiles/ntirpc.dir/clnt_dg.c.o src/CMakeFiles/ntirpc.dir/clnt_generic.c.o src/CMakeFiles/ntirpc.dir/clnt_perror.c.o src/CMakeFiles/ntirpc.dir/clnt_raw.c.o src/CMakeFiles/ntirpc.dir/clnt_simple.c.o src/CMakeFiles/ntirpc.dir/clnt_vc.c.o src/CMakeFiles/ntirpc.dir/getnetconfig.c.o src/CMakeFiles/ntirpc.dir/getnetpath.c.o src/CMakeFiles/ntirpc.dir/getpeereid.c.o src/CMakeFiles/ntirpc.dir/getrpcent.c.o src/CMakeFiles/ntirpc.dir/mt_misc.c.o src/CMakeFiles/ntirpc.dir/pmap_prot.c.o src/CMakeFiles/ntirpc.dir/pmap_prot2.c.o src/CMakeFiles/ntirpc.dir/pmap_rmt.c.o src/CMakeFiles/ntirpc.dir/rbtree.c.o src/CMakeFiles/ntirpc.dir/rbtree_x.c.o src/CMakeFiles/ntirpc.dir/rpc_prot.c.o src/CMakeFiles/ntirpc.dir/rpc_callmsg.c.o src/CMakeFiles/ntirpc.dir/rpc_commondata.c.o src/CMakeFiles/ntirpc.dir/rpc_crc32.c.o src/CMakeFiles/ntirpc.dir/rpc_dplx_msg.c.o src/CMakeFiles/ntirpc.dir/rpc_dtablesize.c.o src/CMakeFiles/ntirpc.dir/rpc_generic.c.o src/CMakeFiles/ntirpc.dir/rpcb_clnt.c.o src/CMakeFiles/ntirpc.dir/rpcb_prot.c.o src/CMakeFiles/ntirpc.dir/rpcb_st_xdr.c.o src/CMakeFiles/ntirpc.dir/strlcpy.c.o src/CMakeFiles/ntirpc.dir/svc.c.o src/CMakeFiles/ntirpc.dir/svc_auth.c.o src/CMakeFiles/ntirpc.dir/svc_auth_unix.c.o src/CMakeFiles/ntirpc.dir/svc_auth_none.c.o src/CMakeFiles/ntirpc.dir/svc_dg.c.o src/CMakeFiles/ntirpc.dir/svc_generic.c.o src/CMakeFiles/ntirpc.dir/svc_raw.c.o src/CMakeFiles/ntirpc.dir/svc_rqst.c.o src/CMakeFiles/ntirpc.dir/svc_simple.c.o src/CMakeFiles/ntirpc.dir/svc_vc.c.o src/CMakeFiles/ntirpc.dir/svc_xprt.c.o src/CMakeFiles/ntirpc.dir/xdr.c.o src/CMakeFiles/ntirpc.dir/xdr_float.c.o src/CMakeFiles/ntirpc.dir/xdr_mem.c.o src/CMakeFiles/ntirpc.dir/xdr_reference.c.o src/CMakeFiles/ntirpc.dir/xdr_ioq.c.o src/CMakeFiles/ntirpc.dir/svc_ioq.c.o src/CMakeFiles/ntirpc.dir/work_pool.c.o -Wl,-rpath,/home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native/usr/lib: -latomic -lurcu-bp /home/pneves/Projects/yocto-superproject/poky/build/tmp/work/armv5e-poky-linux-gnueabi/ntirpc/4.0-r0/recipe-sysroot-native/usr/lib/libnsl.so && :
| FAILED: src/libntirpc.so.4.0
YP libnsl functionality is already protected by ifdef guards where necessary and there are uses where it is not required. Add USE_LIBNSL as a build system knob. Upstream-Status: Submitted [nfs-ganesha#255] Signed-off-by: Paulo Neves <ptsneves@gmail.com> %% original patch: 0001-CMakeLists.txt-Make-libnsl-optional.patch
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In the new commit you can just disable USE_LIBNSL and make the tests you wish even on Fedora. That is possible as the detection of libnsl is disabled with that setting. |
dang
reviewed
Sep 15, 2022
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@dang i believe the parts that are dependent on NSL but are not protected, are not built at all. I found some manually but they were not even in the build list. I did not submit changes on that code as protecting on dead code does not make much sense to me. On the other hand i did not want to add removal of dead code to this PR. |
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If the link is failing, then some code must be using NSL, and we need to find and protect it. |
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Ah I understand. I think it is just the FindNSL code that automatically adds -lnsl2 to the linking command, regardless of code needing it. I get your point though and will have a closer look. |
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YP libnsl functionality is already protected by ifdef guards where necessary and there are usecases where it is not required. Add USE_LIBNSL as a build system knob. Fixes #254
Signed-off-by: Paulo Neves ptsneves@gmail.com