diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-01-04 13:46:38 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-04-17 16:12:41 -0300 |
| commit | 3be1ab1ff9a6e9e8115702c4dd6c8cb6e207a36d (patch) | |
| tree | 00a372bb407c72cb32fcf2a97420e9c3e6597676 /configure.ac | |
| parent | 1eed82b6917bfd26e642b6eaf831d08595cf9cfb (diff) | |
| download | glibc-3be1ab1ff9a6e9e8115702c4dd6c8cb6e207a36d.tar.gz glibc-3be1ab1ff9a6e9e8115702c4dd6c8cb6e207a36d.tar.xz glibc-3be1ab1ff9a6e9e8115702c4dd6c8cb6e207a36d.zip | |
Use -Wl,--undefined-version if linker requires it
The lld might set --no-undefined-version as default, which triggers a lot of error since the Versions files may contain entries not exported by all ABI. The -Wl,--undefined-version can not be set by default, since binutils ld does not support (although gold does). So it requires to be checked at configure if linker requires and enabled it conditionally.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index b501ddd439..5f75b25105 100644 --- a/configure.ac +++ b/configure.ac @@ -1254,6 +1254,33 @@ LIBC_LINKER_FEATURE([--no-dynamic-linker], [libc_cv_no_dynamic_linker=no]) LIBC_CONFIG_VAR([have-no-dynamic-linker], [$libc_cv_no_dynamic_linker]) +AC_CACHE_CHECK(whether to suppress unused version in version script, + libc_cv_undefined_version, [dnl +cat > conftest.c <<EOF +void foo (void) { } +EOF +cat > conftest.map <<EOF +VER_1.0 { + global: + bar; +}; +EOF +libc_cv_undefined_version="" +if ! AC_TRY_COMMAND([${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared -Wl,--version-script=conftest.map conftest.c -o conftest.so]); +then + LIBC_LINKER_FEATURE([--undefined-version], + [-Wl,--undefined-version], + [libc_cv_support_undefined_version=yes], + [libc_cv_support_undefined_version=no]) + if test "$libc_cv_support_undefined_version" = no; then + AC_MSG_ERROR([support for -Wl,--undefined-version required]) + fi + libc_cv_undefined_version="-Wl,--undefined-version" +fi +rm -f conftest.*t]) +LIBC_CONFIG_VAR([config-ldflags-undefined-version],[$libc_cv_undefined_version]) + + AC_CACHE_CHECK(for -static-pie, libc_cv_static_pie, [dnl LIBC_TRY_CC_OPTION([-static-pie], [libc_cv_static_pie=yes], |