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meson: libelf.pc is not always available

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libelf, just like libc, is not a single project. It is an interface
which can be implemented independently by different operating systems.
Therefore, we cannot expect all systems to provide a .pc file, and we
should fallback to cc.find_library and cc.has_function like what we
already do in autotools build.
This commit is contained in:
Ting-Wei Lan 2018-06-03 02:32:22 +08:00
parent c61f01f0ff
commit a77790330b
1 changed files with 17 additions and 0 deletions
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17
gio/meson.build
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@ -855,9 +855,26 @@ else
endif endif
# Dependencies used by executables below # Dependencies used by executables below
have_libelf = false
libelf = dependency('libelf', version : '>= 0.8.12', required : false) libelf = dependency('libelf', version : '>= 0.8.12', required : false)
if libelf.found() if libelf.found()
have_libelf = true
else
# This fallback is necessary on *BSD. elfutils isn't the only libelf
# implementation, and *BSD usually includes their own libelf as a system
# library which doesn't have a corresponding .pc file.
libelf = cc.find_library('elf', required : false)
have_libelf = libelf.found()
have_libelf = have_libelf and cc.has_function('elf_begin', dependencies : libelf)
have_libelf = have_libelf and cc.has_function('elf_getshdrstrndx', dependencies : libelf)
have_libelf = have_libelf and cc.has_function('elf_getshdrnum', dependencies : libelf)
have_libelf = have_libelf and cc.has_header('libelf.h')
endif
if have_libelf
glib_conf.set('HAVE_LIBELF', 1) glib_conf.set('HAVE_LIBELF', 1)
else
libelf = []
endif endif
gconstructor_as_data_h = custom_target('gconstructor_as_data.h', gconstructor_as_data_h = custom_target('gconstructor_as_data.h',