Bug 674010 - Remove check for DLL-challenged libcs. r=ted

configure.in

@@ -3892,63 +3892,6 @@ if test "x$ac_cv_va_val_copy" = "xno"; then
 fi
 AC_MSG_RESULT($ac_cv_va_val_copy)
 
-dnl Check for dll-challenged libc's.
-dnl This check is apparently only needed for Linux.
-case "$target" in
-	*-linux*)
-	    dnl ===================================================================
-	    _curdir=`pwd`
-	    export _curdir
-	    rm -rf conftest* _conftest
-	    mkdir _conftest
-	    cat >> conftest.C <<\EOF
-#include <stdio.h>
-#include <link.h>
-#include <dlfcn.h>
-#ifdef _dl_loaded
-void __dump_link_map(void) {
-  struct link_map *map = _dl_loaded;
-  while (NULL != map) {printf("0x%08x %s\n", map->l_addr, map->l_name); map = map->l_next;}
-}
-int main() {
-  dlopen("./conftest1.so",RTLD_LAZY);
-  dlopen("./../_conftest/conftest1.so",RTLD_LAZY);
-  dlopen("CURDIR/_conftest/conftest1.so",RTLD_LAZY);
-  dlopen("CURDIR/_conftest/../_conftest/conftest1.so",RTLD_LAZY);
-  __dump_link_map();
-}
-#else
-/* _dl_loaded isn't defined, so this should be either a libc5 (glibc1) system, or a glibc2 system that doesn't have the multiple load bug (i.e., RH6.0).*/
-int main() { printf("./conftest1.so\n"); }
-#endif
-EOF
-
-	    $PERL -p -i -e "s/CURDIR/\$ENV{_curdir}/g;" conftest.C
-
-	    cat >> conftest1.C <<\EOF
-#include <stdio.h>
-void foo(void) {printf("foo in dll called\n");}
-EOF
-	    ${CXX-g++} -fPIC -c -g conftest1.C
-	    ${CXX-g++} -shared -Wl,-h -Wl,conftest1.so -o conftest1.so conftest1.o
-	    ${CXX-g++} -g conftest.C -o conftest -ldl
-	    cp -f conftest1.so conftest _conftest
-	    cd _conftest
-	    if test `./conftest | grep conftest1.so | wc -l` -gt 1
-	    then
-		echo
-		echo "*** Your libc has a bug that can result in loading the same dynamic"
-		echo "*** library multiple times.  This bug is known to be fixed in glibc-2.0.7-32"
-		echo "*** or later.  However, if you choose not to upgrade, the only effect"
-		echo "*** will be excessive memory usage at runtime."
-		echo
-	    fi
-	    cd ${_curdir}
-	    rm -rf conftest* _conftest
-	    dnl ===================================================================
-	    ;;
-esac
-
 dnl ===================================================================
 dnl ========================================================
 dnl Put your C++ language/feature checks below

js/src/configure.in

@@ -3807,63 +3807,6 @@ if test "x$ac_cv_va_val_copy" = "xno"; then
 fi
 AC_MSG_RESULT($ac_cv_va_val_copy)
 
-dnl Check for dll-challenged libc's.
-dnl This check is apparently only needed for Linux.
-case "$target" in
-	*-linux*)
-	    dnl ===================================================================
-	    _curdir=`pwd`
-	    export _curdir
-	    rm -rf conftest* _conftest
-	    mkdir _conftest
-	    cat >> conftest.C <<\EOF
-#include <stdio.h>
-#include <link.h>
-#include <dlfcn.h>
-#ifdef _dl_loaded
-void __dump_link_map(void) {
-  struct link_map *map = _dl_loaded;
-  while (NULL != map) {printf("0x%08x %s\n", map->l_addr, map->l_name); map = map->l_next;}
-}
-int main() {
-  dlopen("./conftest1.so",RTLD_LAZY);
-  dlopen("./../_conftest/conftest1.so",RTLD_LAZY);
-  dlopen("CURDIR/_conftest/conftest1.so",RTLD_LAZY);
-  dlopen("CURDIR/_conftest/../_conftest/conftest1.so",RTLD_LAZY);
-  __dump_link_map();
-}
-#else
-/* _dl_loaded isn't defined, so this should be either a libc5 (glibc1) system, or a glibc2 system that doesn't have the multiple load bug (i.e., RH6.0).*/
-int main() { printf("./conftest1.so\n"); }
-#endif
-EOF
-
-	    $PERL -p -i -e "s/CURDIR/\$ENV{_curdir}/g;" conftest.C
-
-	    cat >> conftest1.C <<\EOF
-#include <stdio.h>
-void foo(void) {printf("foo in dll called\n");}
-EOF
-	    ${CXX-g++} -fPIC -c -g conftest1.C
-	    ${CXX-g++} -shared -Wl,-h -Wl,conftest1.so -o conftest1.so conftest1.o
-	    ${CXX-g++} -g conftest.C -o conftest -ldl
-	    cp -f conftest1.so conftest _conftest
-	    cd _conftest
-	    if test `./conftest | grep conftest1.so | wc -l` -gt 1
-	    then
-		echo
-		echo "*** Your libc has a bug that can result in loading the same dynamic"
-		echo "*** library multiple times.  This bug is known to be fixed in glibc-2.0.7-32"
-		echo "*** or later.  However, if you choose not to upgrade, the only effect"
-		echo "*** will be excessive memory usage at runtime."
-		echo
-	    fi
-	    cd ${_curdir}
-	    rm -rf conftest* _conftest
-	    dnl ===================================================================
-	    ;;
-esac
-
 dnl ===================================================================
 dnl ========================================================
 dnl Put your C++ language/feature checks below