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90 lines
2.6 KiB
Diff
90 lines
2.6 KiB
Diff
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From fc392c939b9a18959482f588aff0afc29dd6d30a Mon Sep 17 00:00:00 2001
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From: Romain Naour <romain.naour at openwide.fr>
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Date: Fri, 23 Jan 2015 22:20:18 +0100
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Subject: [PATCH 6/6] unix/configure: borrow the LFS test from autotools.
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Infozip's LFS check can't work for cross-compilation
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since it try to run a target's binary on the host system.
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Instead, use to LFS test used by autotools which is a
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compilation test.
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(see autotools/lib/autoconf/specific.m4)
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Reported-by: Richard Genoud <richard.genoud at gmail.com>
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Signed-off-by: Romain Naour <romain.naour at openwide.fr>
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---
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configure | 46 +++++++++++++++-------------------------------
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1 file changed, 15 insertions(+), 31 deletions(-)
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--- a/unix/configure
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+++ b/unix/configure
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@@ -399,9 +399,8 @@ else
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fi
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-# Now we set the 64-bit file environment and check the size of off_t
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-# Added 11/4/2003 EG
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-# Revised 8/12/2004 EG
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+# LFS check borrowed from autotools sources
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+# lib/autoconf/specific.m4
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echo Check for Large File Support
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cat > conftest.c << _EOF_
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@@ -410,23 +409,19 @@ cat > conftest.c << _EOF_
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# define _FILE_OFFSET_BITS 64 /* select default interface as 64 bit */
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# define _LARGE_FILES /* some OSes need this for 64-bit off_t */
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#include <sys/types.h>
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-#include <sys/stat.h>
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-#include <unistd.h>
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-#include <stdio.h>
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+
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+ /* Check that off_t can represent 2**63 - 1 correctly.
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+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
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+ since some C++ compilers masquerading as C compilers
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+ incorrectly reject 9223372036854775807. */
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+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
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+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
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+ && LARGE_OFF_T % 2147483647 == 1)
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+ ? 1 : -1];
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+
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int main()
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{
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- off_t offset;
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- struct stat s;
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- /* see if have 64-bit off_t */
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- if (sizeof(offset) < 8)
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- return 1;
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- printf(" off_t is %d bytes\n", sizeof(off_t));
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- /* see if have 64-bit stat */
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- if (sizeof(s.st_size) < 8) {
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- printf(" s.st_size is %d bytes\n", sizeof(s.st_size));
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- return 2;
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- }
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- return 3;
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+ return 0;
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}
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_EOF_
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# compile it
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@@ -434,19 +429,8 @@ $CC -o conftest conftest.c >/dev/null 2>
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if [ $? -ne 0 ]; then
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echo -- no Large File Support
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else
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-# run it
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- ./conftest
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- r=$?
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- if [ $r -eq 1 ]; then
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- echo -- no Large File Support - no 64-bit off_t
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- elif [ $r -eq 2 ]; then
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- echo -- no Large File Support - no 64-bit stat
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- elif [ $r -eq 3 ]; then
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- echo -- yes we have Large File Support!
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- CFLAGS="${CFLAGS} -DLARGE_FILE_SUPPORT"
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- else
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- echo -- no Large File Support - conftest returned $r
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- fi
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+ echo -- yes we have Large File Support!
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+ CFLAGS="${CFLAGS} -DLARGE_FILE_SUPPORT"
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fi
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