* gdb.texinfo (Machine Code) <disassemble-next-line>: Improve and

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

diff --git a/gold/configure.ac b/gold/configure.ac
index b0efef1e55c97e1e679044cefd48650fbff5ba37..ad04fa6bb60ce97d9e6dbe25e2f15b6208239674 100644 (file)
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -103,6 +103,7 @@ all_targets=
 default_machine=
 default_size=
 default_big_endian=
+default_osabi=ELFOSABI_NONE
 targ_32_little=
 targ_32_big=
 targ_64_little=
@@ -149,6 +150,7 @@ for targ in $target $canon_targets; do
         default_machine=$targ_machine
        default_size=$targ_size
        default_big_endian=$targ_big_endian
+       default_osabi=$targ_osabi
       fi
     fi
   fi
@@ -184,6 +186,8 @@ AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
                   [Default size (32 or 64)])
 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
                   [Default big endian (true or false)])
+AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
+                  [Default OSABI code])
 
 AC_PROG_CC
 AC_PROG_CXX
@@ -262,18 +266,18 @@ CFLAGS="$save_CFLAGS"
 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 
 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
-dnl only with glibc 2.5 or later.
-AC_CACHE_CHECK([for glibc >= 2.5], [gold_cv_lib_glibc25],
+dnl only with glibc 2.9 or later.
+AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 [AC_COMPILE_IFELSE([
 #include <features.h>
 #if !defined __GLIBC__
 error
-#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 5)
+#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 error
 #endif
-], [gold_cv_lib_glibc25=yes], [gold_cv_lib_glibc25=no])])
+], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 
-AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc25" = "yes")
+AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 
 dnl Check whether the compiler supports constructor priorities in
 dnl attributes, which were added in gcc 4.3.
@@ -307,7 +311,8 @@ dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 AC_SUBST(LFS_CFLAGS)
 
-AC_REPLACE_FUNCS(pread)
+AC_CHECK_FUNCS(chsize)
+AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
 
 # Link in zlib if we can.  This allows us to write compressed sections.
 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
@@ -317,7 +322,21 @@ AC_LANG_PUSH(C++)
 
 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
-AC_CHECK_FUNCS(mallinfo)
+AC_CHECK_HEADERS(byteswap.h)
+AC_CHECK_FUNCS(mallinfo posix_fallocate)
+
+# Use of ::std::tr1::unordered_map::rehash causes undefined symbols
+# at link time with some versions of GCC.
+AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
+[gold_cv_unordered_map_rehash],
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <tr1/unordered_map>
+void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
+]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
+if test "$gold_cv_unordered_map_rehash" = "yes"; then
+  AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
+           [Define if ::std::tr1::unordered_map::rehash 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