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build: move compiler version check to meson

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Use the slighly nicer .version_compare() function for GCC; for Clang that is
not possible due to the mess that Apple does with version numbers.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-10-20 14:34:27 +02:00
parent a988b4c561
commit 13f60de816
2 changed files with 20 additions and 25 deletions
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25
configure vendored
View file

@ -1128,31 +1128,6 @@ if test "$targetos" = "bogus"; then
error_exit "Unrecognized host OS (uname -s reports '$(uname -s)')"
fi
# Check whether the compiler matches our minimum requirements:
cat > $TMPC << EOF
#if defined(__clang_major__) && defined(__clang_minor__)
# ifdef __apple_build_version__
# if __clang_major__ < 12 || (__clang_major__ == 12 && __clang_minor__ < 0)
# error You need at least XCode Clang v12.0 to compile QEMU
# endif
# else
# if __clang_major__ < 10 || (__clang_major__ == 10 && __clang_minor__ < 0)
# error You need at least Clang v10.0 to compile QEMU
# endif
# endif
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
# if __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 4)
# error You need at least GCC v7.4.0 to compile QEMU
# endif
#else
# error You either need GCC or Clang to compiler QEMU
#endif
int main (void) { return 0; }
EOF
if ! compile_prog "" "" ; then
error_exit "You need at least GCC v7.4 or Clang v10.0 (or XCode Clang v12.0)"
fi
if test "$static" = "yes" ; then
if test "$plugins" = "yes"; then
error_exit "static and plugins are mutually incompatible"

20
meson.build
View file

@ -190,6 +190,26 @@ endif
# Compiler flags #
##################
foreach lang : all_languages
compiler = meson.get_compiler(lang)
if compiler.get_id() == 'gcc' and compiler.version().version_compare('>=7.4')
# ok
elif compiler.get_id() == 'clang' and compiler.compiles('''
#ifdef __apple_build_version__
# if __clang_major__ < 12 || (__clang_major__ == 12 && __clang_minor__ < 0)
# error You need at least XCode Clang v12.0 to compile QEMU
# endif
#else
# if __clang_major__ < 10 || (__clang_major__ == 10 && __clang_minor__ < 0)
# error You need at least Clang v10.0 to compile QEMU
# endif
#endif''')
# ok
else
error('You either need GCC v7.4 or Clang v10.0 (or XCode Clang v12.0) to compile QEMU')
endif
endforeach
# default flags for all hosts
# We use -fwrapv to tell the compiler that we require a C dialect where
# left shift of signed integers is well defined and has the expected