meson: perform snappy test with the C++ compiler if used

Snappy is written in C++ and as such needs to link against libstdc++.  When
linking statically, this means that the compile test cannot succeed unless
performed with a C++ compiler.  Do so if link_language is set to C++; if it
is C, the test will usually fail and snappy will be disabled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-11-04 14:35:14 +01:00
parent b3af7fdf9c
commit 565174d08e

View file

@ -197,6 +197,10 @@ add_project_arguments('-iquote', '.',
link_language = meson.get_external_property('link_language', 'cpp')
if link_language == 'cpp'
add_languages('cpp', required: true, native: false)
cxx = meson.get_compiler('cpp')
linker = cxx
else
linker = cc
endif
if host_machine.system() == 'darwin'
add_languages('objc', required: false, native: false)
@ -1109,7 +1113,7 @@ if not get_option('snappy').auto() or have_system
required: get_option('snappy'),
kwargs: static_kwargs)
endif
if snappy.found() and not cc.links('''
if snappy.found() and not linker.links('''
#include <snappy-c.h>
int main(void) { snappy_max_compressed_length(4096); return 0; }''', dependencies: snappy)
snappy = not_found