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cmake: Add a module to find if argp is in a separate library

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The musl libc, used in Alpine Linux, doesn't have argp support, so check
if it is somewhere else, maybe in the argp-standalone package.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2021-08-13 14:58:14 -03:00
parent 9f9588dc2b
commit 3f70d31571
2 changed files with 42 additions and 0 deletions
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@ -15,6 +15,7 @@ dwarves_fprintf.c
dwarves_reorganize.c
dwarves_reorganize.h
cmake/modules/FindDWARF.cmake
cmake/modules/Findargp.cmake
CMakeLists.txt
codiff.c
ctracer.c

41
cmake/modules/Findargp.cmake Normal file
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@ -0,0 +1,41 @@
# - Find argp
# Figure out if argp is in glibc or if it argp-standalone
#
# ARGP_LIBRARY - Library to use argp
# ARGP_FOUND - True if found.
message(STATUS "Checking availability of argp library")
INCLUDE(CheckLibraryExists)
if (ARGP_LIBRARY)
# Already in cache, be silent
set(ARGP_FIND_QUIETLY TRUE)
endif (ARGP_LIBRARY)
find_library(ARGP_LIBRARY
NAMES argp
PATHS /usr/lib /usr/local/lib /usr/lib64 /usr/local/lib64 ~/usr/local/lib ~/usr/local/lib64
)
if (ARGP_LIBRARY)
set(ARGP_FOUND TRUE)
set(ARGP_LIBRARY ${ARGP_LIBRARY})
set(CMAKE_REQUIRED_LIBRARIES ${ARGP_LIBRARY})
else (ARGP_LIBRARY)
set(ARGP_LIBRARY "")
endif (ARGP_LIBRARY)
if (ARGP_FOUND)
if (NOT ARGP_FIND_QUIETLY)
message(STATUS "Found argp library: ${ARGP_LIBRARY}")
endif (NOT ARGP_FIND_QUIETLY)
else (ARGP_FOUND)
set(ARGP_FOUND TRUE)
message(STATUS "Assuming argp is in libc")
endif (ARGP_FOUND)
mark_as_advanced(ARGP_LIBRARY)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.cmake ${CMAKE_CURRENT_SOURCE_DIR}/config.h)
message(STATUS "Checking availability of argp library - done")