check for and enable Large File Support automatically

If you try to process a file using a 32bit build that is larger than
2GiB in size, the linux kernel will reject things:
$ strace -eopen dump_syms ./chrome ./ > chrome.sym
...
open(".//chrome.debug", O_RDONLY)       = -1 EOVERFLOW (Value too large for defined data type)

So let's use the existing autoconf macro to check for and enable support
as need be.

We have to shift the existing m32 logic up to before we start doing
feature test macros though otherwise a simple configure won't work:
$ ./configure --enable-m32
This is because it first tests LFS and such w/out the -m32 flags.

BUG=chromium:266064
TEST=`./configure --enable-m32 && make && make check` passes
R=benchan@chromium.org

Review URL: https://breakpad.appspot.com/619002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1250 4c0a9323-5329-0410-9bdc-e9ce6186880e

3 files changed, 249 insertions, 39 deletions

diff --git a/configure b/configure
index f84e0a17..c8bee1f2 100755
--- a/configure
+++ b/configure
@@ -753,6 +753,7 @@ enable_option_checking
 enable_silent_rules
 enable_dependency_tracking
 enable_m32
+enable_largefile
 enable_processor
 enable_tools
 enable_selftest
@@ -1396,6 +1397,7 @@ Optional Features:
   --disable-dependency-tracking
                           speeds up one-time build
   --enable-m32            Compile/build with -m32 (default is no)
+  --disable-largefile     omit support for large files
   --disable-processor     Don't build processor library (default is no)
   --disable-tools         Don't build tool binaries (default is no)
   --enable-selftest       Run extra tests with "make check" (may conflict with
@@ -5491,6 +5493,26 @@ else
 fi
    # let the Makefile know if we're gcc
 
+# Check whether --enable-m32 was given.
+if test "${enable_m32+set}" = set; then :
+  enableval=$enable_m32; case "${enableval}" in
+                 yes)
+                   CFLAGS="${CFLAGS} -m32"
+                   CXXFLAGS="${CXXFLAGS} -m32"
+                   usem32=true
+                   ;;
+                 no)
+                   usem32=false
+                   ;;
+                 *)
+                   as_fn_error $? "bad value ${enableval} for --enable-m32" "$LINENO" 5
+                   ;;
+               esac
+else
+  usem32=false
+fi
+
+
 
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
@@ -5735,6 +5757,206 @@ $as_echo "#define STDC_HEADERS 1" >>confdefs.h
 
 fi
 
+# Check whether --enable-largefile was given.
+if test "${enable_largefile+set}" = set; then :
+  enableval=$enable_largefile;
+fi
+
+if test "$enable_largefile" != no; then
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
+$as_echo_n "checking for special C compiler options needed for large files... " >&6; }
+if ${ac_cv_sys_largefile_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_sys_largefile_CC=no
+     if test "$GCC" != yes; then
+       ac_save_CC=$CC
+       while :; do
+	 # IRIX 6.2 and later do not support large files by default,
+	 # so use the C compiler's -n32 option if that helps.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+	 if ac_fn_c_try_compile "$LINENO"; then :
+  break
+fi
+rm -f core conftest.err conftest.$ac_objext
+	 CC="$CC -n32"
+	 if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_largefile_CC=' -n32'; break
+fi
+rm -f core conftest.err conftest.$ac_objext
+	 break
+       done
+       CC=$ac_save_CC
+       rm -f conftest.$ac_ext
+    fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
+$as_echo "$ac_cv_sys_largefile_CC" >&6; }
+  if test "$ac_cv_sys_largefile_CC" != no; then
+    CC=$CC$ac_cv_sys_largefile_CC
+  fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+$as_echo_n "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
+if ${ac_cv_sys_file_offset_bits+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  while :; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_file_offset_bits=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_file_offset_bits=64; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  ac_cv_sys_file_offset_bits=unknown
+  break
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
+$as_echo "$ac_cv_sys_file_offset_bits" >&6; }
+case $ac_cv_sys_file_offset_bits in #(
+  no | unknown) ;;
+  *)
+cat >>confdefs.h <<_ACEOF
+#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits
+_ACEOF
+;;
+esac
+rm -rf conftest*
+  if test $ac_cv_sys_file_offset_bits = unknown; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
+$as_echo_n "checking for _LARGE_FILES value needed for large files... " >&6; }
+if ${ac_cv_sys_large_files+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  while :; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_large_files=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#define _LARGE_FILES 1
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+    since some C++ compilers masquerading as C compilers
+    incorrectly reject 9223372036854775807.  */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+		       && LARGE_OFF_T % 2147483647 == 1)
+		      ? 1 : -1];
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_large_files=1; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  ac_cv_sys_large_files=unknown
+  break
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
+$as_echo "$ac_cv_sys_large_files" >&6; }
+case $ac_cv_sys_large_files in #(
+  no | unknown) ;;
+  *)
+cat >>confdefs.h <<_ACEOF
+#define _LARGE_FILES $ac_cv_sys_large_files
+_ACEOF
+;;
+esac
+rm -rf conftest*
+  fi
+
+
+fi
+
 # ===========================================================================
 #           http://www.nongnu.org/autoconf-archive/ax_pthread.html
 # ===========================================================================
@@ -6248,26 +6470,6 @@ else
 fi
 
 
-# Check whether --enable-m32 was given.
-if test "${enable_m32+set}" = set; then :
-  enableval=$enable_m32; case "${enableval}" in
-                 yes)
-                   CFLAGS="${CFLAGS} -m32"
-                   CXXFLAGS="${CXXFLAGS} -m32"
-                   usem32=true
-                   ;;
-                 no)
-                   usem32=false
-                   ;;
-                 *)
-                   as_fn_error $? "bad value ${enableval} for --enable-m32" "$LINENO" 5
-                   ;;
-               esac
-else
-  usem32=false
-fi
-
-
 # Check whether --enable-processor was given.
 if test "${enable_processor+set}" = set; then :
   enableval=$enable_processor; case "${enableval}" in
diff --git a/configure.ac b/configure.ac
index 84295520..e2afc072 100644
--- a/configure.ac
+++ b/configure.ac
@@ -48,7 +48,28 @@ AC_PROG_CXX
 AC_PROG_RANLIB
 AM_CONDITIONAL(GCC, test "$GCC" = yes)   # let the Makefile know if we're gcc
 
+dnl This must come before all the feature tests below.
+AC_ARG_ENABLE(m32,
+              AS_HELP_STRING([--enable-m32],
+                             [Compile/build with -m32]
+                             [(default is no)]),
+              [case "${enableval}" in
+                 yes)
+                   CFLAGS="${CFLAGS} -m32"
+                   CXXFLAGS="${CXXFLAGS} -m32"
+                   usem32=true
+                   ;;
+                 no)
+                   usem32=false
+                   ;;
+                 *)
+                   AC_MSG_ERROR(bad value ${enableval} for --enable-m32)
+                   ;;
+               esac],
+              [usem32=false])
+
 AC_HEADER_STDC
+AC_SYS_LARGEFILE
 m4_include(m4/ax_pthread.m4)
 AX_PTHREAD
 AC_CHECK_HEADERS([a.out.h])
@@ -69,25 +90,6 @@ case $host in
 esac
 AM_CONDITIONAL(ANDROID_HOST, test x$ANDROID_HOST = xtrue)
 
-AC_ARG_ENABLE(m32,
-              AS_HELP_STRING([--enable-m32],
-                             [Compile/build with -m32]
-                             [(default is no)]),
-              [case "${enableval}" in
-                 yes)
-                   CFLAGS="${CFLAGS} -m32"
-                   CXXFLAGS="${CXXFLAGS} -m32"
-                   usem32=true
-                   ;;
-                 no)
-                   usem32=false
-                   ;;
-                 *)
-                   AC_MSG_ERROR(bad value ${enableval} for --enable-m32)
-                   ;;
-               esac],
-              [usem32=false])
-
 AC_ARG_ENABLE(processor,
               AS_HELP_STRING([--disable-processor],
                              [Don't build processor library]
diff --git a/src/config.h.in b/src/config.h.in
index f5e5e280..3746e830 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -63,3 +63,9 @@
 
 /* Version number of package */
 #undef VERSION
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+#undef _FILE_OFFSET_BITS
+
+/* Define for large files, on AIX-style hosts. */
+#undef _LARGE_FILES