001-unix-configure-borrow-the-LFS-test-from-autotools.patch (2744B)
1 From fc392c939b9a18959482f588aff0afc29dd6d30a Mon Sep 17 00:00:00 2001 2 From: Romain Naour <romain.naour at openwide.fr> 3 Date: Fri, 23 Jan 2015 22:20:18 +0100 4 Subject: [PATCH 6/6] unix/configure: borrow the LFS test from autotools. 5 6 Infozip's LFS check can't work for cross-compilation 7 since it try to run a target's binary on the host system. 8 9 Instead, use to LFS test used by autotools which is a 10 compilation test. 11 (see autotools/lib/autoconf/specific.m4) 12 13 Reported-by: Richard Genoud <richard.genoud at gmail.com> 14 Signed-off-by: Romain Naour <romain.naour at openwide.fr> 15 --- 16 configure | 46 +++++++++++++++------------------------------- 17 1 file changed, 15 insertions(+), 31 deletions(-) 18 19 diff --rupN a/unix/configure b/unix/configure 20 --- a/unix/configure 21 +++ b/unix/configure 22 @@ -399,9 +399,8 @@ else 23 fi 24 25 26 -# Now we set the 64-bit file environment and check the size of off_t 27 -# Added 11/4/2003 EG 28 -# Revised 8/12/2004 EG 29 +# LFS check borrowed from autotools sources 30 +# lib/autoconf/specific.m4 31 32 echo Check for Large File Support 33 cat > conftest.c << _EOF_ 34 @@ -410,23 +409,19 @@ cat > conftest.c << _EOF_ 35 # define _FILE_OFFSET_BITS 64 /* select default interface as 64 bit */ 36 # define _LARGE_FILES /* some OSes need this for 64-bit off_t */ 37 #include <sys/types.h> 38 -#include <sys/stat.h> 39 -#include <unistd.h> 40 -#include <stdio.h> 41 + 42 + /* Check that off_t can represent 2**63 - 1 correctly. 43 + We can't simply define LARGE_OFF_T to be 9223372036854775807, 44 + since some C++ compilers masquerading as C compilers 45 + incorrectly reject 9223372036854775807. */ 46 +#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62)) 47 + int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721 48 + && LARGE_OFF_T % 2147483647 == 1) 49 + ? 1 : -1]; 50 + 51 int main() 52 { 53 - off_t offset; 54 - struct stat s; 55 - /* see if have 64-bit off_t */ 56 - if (sizeof(offset) < 8) 57 - return 1; 58 - printf(" off_t is %d bytes\n", sizeof(off_t)); 59 - /* see if have 64-bit stat */ 60 - if (sizeof(s.st_size) < 8) { 61 - printf(" s.st_size is %d bytes\n", sizeof(s.st_size)); 62 - return 2; 63 - } 64 - return 3; 65 + return 0; 66 } 67 _EOF_ 68 # compile it 69 @@ -434,19 +429,8 @@ $CC -o conftest conftest.c >/dev/null 2> 70 if [ $? -ne 0 ]; then 71 echo -- no Large File Support 72 else 73 -# run it 74 - ./conftest 75 - r=$? 76 - if [ $r -eq 1 ]; then 77 - echo -- no Large File Support - no 64-bit off_t 78 - elif [ $r -eq 2 ]; then 79 - echo -- no Large File Support - no 64-bit stat 80 - elif [ $r -eq 3 ]; then 81 - echo -- yes we have Large File Support! 82 - CFLAGS="${CFLAGS} -DLARGE_FILE_SUPPORT" 83 - else 84 - echo -- no Large File Support - conftest returned $r 85 - fi 86 + echo -- yes we have Large File Support! 87 + CFLAGS="${CFLAGS} -DLARGE_FILE_SUPPORT" 88 fi 89 90