2012-07-16 Sriraman Tallam <tmsriram@google.com>

[deliverable/binutils-gdb.git] / gold / configure.ac

diff --git a/gold/configure.ac b/gold/configure.ac
index e49bf211e6afcbc51b59d52502873046c1483fb7..5e3dc0601c04074213ce82180f2c1c42211a8d0e 100644 (file)
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -11,6 +11,15 @@ AM_INIT_AUTOMAKE([no-dist parallel-tests])
 
 AM_CONFIG_HEADER(config.h:config.in)
 
+# PR 14072
+AH_VERBATIM([00_CONFIG_H_CHECK],
+[/* Check that config.h is #included before system headers
+   (this works only for glibc, but that should be enough).  */
+#if defined(__GLIBC__) && !defined(__CONFIG_H__)
+#  error config.h must be #included before system headers
+#endif
+#define __CONFIG_H__ 1])
+
 AC_ARG_WITH(sysroot,
 [  --with-sysroot[=DIR]    search for usr/lib et al within DIR],
 [sysroot=$withval], [sysroot=no])
@@ -45,7 +54,7 @@ dnl "installed_linker" is the installed gold linker name.
 default_ld=
 AC_ARG_ENABLE(ld,
 [[  --enable-ld[=ARG]     build ld [ARG={default,yes,no}]]],
-[case "${enableval}" in 
+[case "${enableval}" in
   default)
     default_ld=ld.bfd
     ;;
@@ -359,8 +368,14 @@ AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 
 dnl Test for the -ftls-dialect=gnu2 option.
 save_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS -mtls-dialect=gnu2"
-AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
+CFLAGS="$CFLAGS -fpic -mtls-dialect=gnu2"
+AC_COMPILE_IFELSE([
+__thread int i;
+void foo (void)
+{
+  i = 10;
+}
+], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 CFLAGS="$save_CFLAGS"
 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 
@@ -484,7 +499,7 @@ AC_LANG_PUSH(C++)
 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 AC_CHECK_HEADERS(byteswap.h)
-AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
+AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times)
 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
 
 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
@@ -500,6 +515,25 @@ if test "$gold_cv_unordered_map_rehash" = "yes"; then
            [Define if ::std::tr1::unordered_map::rehash is usable])
 fi
 
+# Use of tr1/unordered_map with off_t as a key is not supported on GCC
+# 4.1.xx when compiling in 32-bit mode with a 64-bit off_t type.
+AC_CACHE_CHECK([whether std::tr1::hash<off_t> is defined],
+[gold_cv_hash_off_t],
+[CXXFLAGS_hold=$CXXFLAGS
+CXXFLAGS="$CXXFLAGS $LFS_CFLAGS"
+AC_COMPILE_IFELSE([
+#include <sys/types.h>
+#include <tr1/unordered_map>
+std::tr1::hash<off_t> h;
+],
+[gold_cv_hash_off_t=yes],
+[gold_cv_hash_off_t=no])
+CXXFLAGS=$CFLAGS_hold])
+if test "$gold_cv_hash_off_t" = "yes"; then
+   AC_DEFINE(HAVE_TR1_HASH_OFF_T, 1,
+            [Define if std::tr1::hash<off_t> is usable])
+fi
+
 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 # function.  Check for that.  This is gcc bug 35546.  This test can
 # probably be removed after the bug has been fixed for a while.
@@ -530,6 +564,10 @@ fi
 
 AC_LANG_POP(C++)
 
+AC_CHECK_HEADERS(locale.h)
+AC_CHECK_FUNCS(setlocale)
+AM_LC_MESSAGES
+
 AM_MAINTAINER_MODE
 
 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)