rust: avoid clobbering LIBS

Save LIBS around calls to AC_SEARCH_LIBS to avoid clobbering $LIBS.

ChangeLog:

	* configure: Regenerate.
	* configure.ac: Save LIBS around calls to AC_SEARCH_LIBS.

Signed-off-by: Marc Poulhiès <dkm@kataplop.net>
Reviewed-by: Thomas Schwinge <tschwinge@baylibre.com>
Tested-by: Thomas Schwinge <tschwinge@baylibre.com>

diff --git a/configure b/configure
index 51bf1d1add1854bc8708fa4467b3190755584ca7..e9583f2ba0c7242f57bba58cd3bbc8834eaec4ba 100755 (executable)
--- a/configure
+++ b/configure
@@ -8878,9 +8878,12 @@ fi
 
 # Rust requires -ldl and -lpthread if you are using an old glibc that does not include them by
 # default, so we check for them here
-
+# We are doing the test here and not in the gcc/configure to be able to nicely disable the
+# build of the Rust frontend in case a dep is missing.
 missing_rust_dynlibs=none
 
+save_LIBS="$LIBS"
+LIBS=
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
 $as_echo_n "checking for library containing dlopen... " >&6; }
 if ${ac_cv_search_dlopen+:} false; then :
@@ -8993,16 +8996,14 @@ if test "$ac_res" != no; then :
 
 fi
 
+CRAB1_LIBS="$LIBS"
+LIBS="$save_LIBS"
 
-if test "$ac_cv_search_dlopen" = -ldl; then
-    CRAB1_LIBS="$CRAB1_LIBS -ldl"
-elif test "$ac_cv_search_dlopen" = no; then
+if test "$ac_cv_search_dlopen" = no; then
     missing_rust_dynlibs="libdl"
 fi
 
-if test "$ac_cv_search_pthread_create" = -lpthread; then
-    CRAB1_LIBS="$CRAB1_LIBS -lpthread"
-elif test "$ac_cv_search_pthread_create" = no; then
+if test "$ac_cv_search_pthread_create" = no; then
     missing_rust_dynlibs="$missing_rust_dynlibs, libpthread"
 fi
 

diff --git a/configure.ac b/configure.ac
index 20457005e2993a6c43fa5a24c6d31530778f58e4..f61dbe64a942ed84459433ddd7ffb7e43e78743d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2039,21 +2039,22 @@ AC_SUBST(PICFLAG)
 
 # Rust requires -ldl and -lpthread if you are using an old glibc that does not include them by
 # default, so we check for them here
-
+# We are doing the test here and not in the gcc/configure to be able to nicely disable the
+# build of the Rust frontend in case a dep is missing.
 missing_rust_dynlibs=none
 
+save_LIBS="$LIBS"
+LIBS=
 AC_SEARCH_LIBS([dlopen], [dl])
 AC_SEARCH_LIBS([pthread_create], [pthread])
+CRAB1_LIBS="$LIBS"
+LIBS="$save_LIBS"
 
-if test "$ac_cv_search_dlopen" = -ldl; then
-    CRAB1_LIBS="$CRAB1_LIBS -ldl"
-elif test "$ac_cv_search_dlopen" = no; then
+if test "$ac_cv_search_dlopen" = no; then
     missing_rust_dynlibs="libdl"
 fi
 
-if test "$ac_cv_search_pthread_create" = -lpthread; then
-    CRAB1_LIBS="$CRAB1_LIBS -lpthread"
-elif test "$ac_cv_search_pthread_create" = no; then
+if test "$ac_cv_search_pthread_create" = no; then
     missing_rust_dynlibs="$missing_rust_dynlibs, libpthread"
 fi