diff options
| author | Andres Freund <andres@anarazel.de> | 2022-03-23 12:43:14 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2022-03-23 12:43:14 -0700 |
| commit | e71c76fcab8d00defe9a7a608facdd9663f7bcbf (patch) | |
| tree | 5813cc77ad34382158931f80f86c74dc4ce06f00 /configure | |
| parent | c97e4bdcb142effc452d33b81f31e0b3ac990b71 (diff) | |
| download | postgresql-e71c76fcab8d00defe9a7a608facdd9663f7bcbf.tar.gz | |
configure: check for dlsym instead of dlopen.
When building with sanitizers the sanitizer library provides dlopen, but not
dlsym(), making configure think that -ldl isn't needed. Just checking for
dlsym() ought to suffice, hard to see dlsym() being provided without dlopen()
also being provided.
Backpatch to all branches, for the same reasons as 46ab07ffda9.
Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn2um@alap3.anarazel.de
Backpatch: 10-
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 27 |
1 files changed, 15 insertions, 12 deletions
@@ -11856,9 +11856,12 @@ if test "$ac_res" != no; then : fi -{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5 -$as_echo_n "checking for library containing dlopen... " >&6; } -if ${ac_cv_search_dlopen+:} false; then : +# gcc/clang's sanitizer helper library provides dlopen but not dlsym, thus +# when enabling asan the dlopen check doesn't notice that -ldl is actually +# required. Just checking for dlsym() ought to suffice. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlsym" >&5 +$as_echo_n "checking for library containing dlsym... " >&6; } +if ${ac_cv_search_dlsym+:} false; then : $as_echo_n "(cached) " >&6 else ac_func_search_save_LIBS=$LIBS @@ -11871,11 +11874,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext #ifdef __cplusplus extern "C" #endif -char dlopen (); +char dlsym (); int main () { -return dlopen (); +return dlsym (); ; return 0; } @@ -11888,25 +11891,25 @@ for ac_lib in '' dl; do LIBS="-l$ac_lib $ac_func_search_save_LIBS" fi if ac_fn_c_try_link "$LINENO"; then : - ac_cv_search_dlopen=$ac_res + ac_cv_search_dlsym=$ac_res fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext - if ${ac_cv_search_dlopen+:} false; then : + if ${ac_cv_search_dlsym+:} false; then : break fi done -if ${ac_cv_search_dlopen+:} false; then : +if ${ac_cv_search_dlsym+:} false; then : else - ac_cv_search_dlopen=no + ac_cv_search_dlsym=no fi rm conftest.$ac_ext LIBS=$ac_func_search_save_LIBS fi -{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5 -$as_echo "$ac_cv_search_dlopen" >&6; } -ac_res=$ac_cv_search_dlopen +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlsym" >&5 +$as_echo "$ac_cv_search_dlsym" >&6; } +ac_res=$ac_cv_search_dlsym if test "$ac_res" != no; then : test "$ac_res" = "none required" || LIBS="$ac_res $LIBS" |