diff options
| -rw-r--r-- | Makerules | 2 | ||||
| -rwxr-xr-x | configure | 36 | ||||
| -rw-r--r-- | configure.ac | 6 |
3 files changed, 43 insertions, 1 deletions
@@ -510,7 +510,7 @@ map-file = $(firstword $($(@F:.so=-map)) \ $(filter $(@F:.so=.map),$(version-maps)))) # The map version is created with multiple symbols that might not be # exported depending of the ABI. -load-map-file = $(map-file:%=-Wl,--version-script=%) -Wl,--undefined-version +load-map-file = $(map-file:%=-Wl,--version-script=%) $(have-undefined-version) endif # Compiler arguments to use to link a shared object with libc and @@ -9246,6 +9246,42 @@ printf "%s\n" "$libc_linker_feature" >&6; } config_vars="$config_vars have-ld-gcs = $libc_cv_ld_gcs" + +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for linker that supports --undefined-version" >&5 +printf %s "checking for linker that supports --undefined-version... " >&6; } +libc_linker_feature=no +cat > conftest.c <<EOF +int _start (void) { return 42; } +EOF +if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp + -Wl,--undefined-version -nostdlib -nostartfiles + -fPIC -shared -o conftest.so conftest.c + 1>&5' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? + printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; } +then + if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -Wl,--undefined-version -nostdlib \ + -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \ + | grep "warning: --undefined-version ignored" > /dev/null 2>&1; then + true + else + libc_linker_feature=yes + fi +fi +rm -f conftest* +if test $libc_linker_feature = yes; then + libc_cv_ld_undefined_version=-Wl,--undefined-version +else + libc_cv_ld_undefined_version= +fi +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_linker_feature" >&5 +printf "%s\n" "$libc_linker_feature" >&6; } +config_vars="$config_vars +have-undefined-version = $libc_cv_ld_undefined_version" + { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we can build programs as PIE" >&5 printf %s "checking if we can build programs as PIE... " >&6; } cat confdefs.h - <<_ACEOF >conftest.$ac_ext diff --git a/configure.ac b/configure.ac index 46a354dfbc..aaf686494a 100644 --- a/configure.ac +++ b/configure.ac @@ -2066,6 +2066,12 @@ LIBC_LINKER_FEATURE([-z gcs=always], [-Wl,-z,gcs=always], [libc_cv_ld_gcs=yes], [libc_cv_ld_gcs=no]) LIBC_CONFIG_VAR([have-ld-gcs], [$libc_cv_ld_gcs]) + +LIBC_LINKER_FEATURE([--undefined-version], [-Wl,--undefined-version], + [libc_cv_ld_undefined_version=-Wl,--undefined-version], + [libc_cv_ld_undefined_version=]) +LIBC_CONFIG_VAR([have-undefined-version], [$libc_cv_ld_undefined_version]) + AC_MSG_CHECKING(if we can build programs as PIE) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifdef PIE_UNSUPPORTED # error PIE is not supported |