* configure.ac: Check for sys/mman.h and mmap. Check for mremap

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

diff --git a/gold/configure b/gold/configure
index 1a0d47d03a0215019eb1f08cb95cb8ad96d0fbaf..5a7268d3494eb2cbd3d55a2ed537dd9ad559a092 100755 (executable)
--- a/gold/configure
+++ b/gold/configure
@@ -6486,18 +6486,32 @@ WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmi
 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 
 
-for ac_func in chsize
+for ac_header in sys/mman.h
 do :
-  ac_fn_c_check_func "$LINENO" "chsize" "ac_cv_func_chsize"
-if test "x$ac_cv_func_chsize" = x""yes; then :
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/mman.h" "ac_cv_header_sys_mman_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_mman_h" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_CHSIZE 1
+#define HAVE_SYS_MMAN_H 1
+_ACEOF
+
+fi
+
+done
+
+for ac_func in chsize mmap
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+eval as_val=\$$as_ac_var
+   if test "x$as_val" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
 
 fi
 done
 
-for ac_func in pread ftruncate mremap ffsll
+for ac_func in pread ftruncate ffsll
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -6519,6 +6533,49 @@ done
 
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking mremap with MREMAP_MAYMOVE" >&5
+$as_echo_n "checking mremap with MREMAP_MAYMOVE... " >&6; }
+if test "${gold_cv_lib_mremap_maymove+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#include <sys/mman.h>
+void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  gold_cv_lib_mremap_maymove=yes
+else
+  gold_cv_lib_mremap_maymove=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gold_cv_lib_mremap_maymove" >&5
+$as_echo "$gold_cv_lib_mremap_maymove" >&6; }
+if test "$gold_cv_lib_mremap_maymove" = "yes"; then
+
+$as_echo "#define HAVE_MREMAP 1" >>confdefs.h
+
+else
+  case " $LIBOBJS " in
+  *" mremap.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS mremap.$ac_objext"
+ ;;
+esac
+
+fi
+
 # Link in zlib if we can.  This allows us to write compressed sections.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing zlibVersion" >&5
 $as_echo_n "checking for library containing zlibVersion... " >&6; }