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build system: don't use -o /dev/null, old gcc can delete /dev/null!

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This commit is contained in:
Denis Vlasenko 2008-02-13 07:47:37 +00:00
parent 59bb4a4f50
commit 0a4624aece
1 changed files with 8 additions and 4 deletions
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12
scripts/trylink
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@ -47,15 +47,19 @@ try() {
}
check_cc() {
if $CC $1 -shared -o /dev/null -xc /dev/null >/dev/null 2>&1; then
local tempname="/tmp/temp.$$.$RANDOM"
# Can use "-o /dev/null", but older gcc tend to *unlink it* on failure! :(
# "-xc": C language. "/dev/null" is an empty source file.
if $CC $1 -shared -xc /dev/null -o "$tempname".o >/dev/null 2>&1; then
echo "$1";
else
echo "$2";
fi
rm "$tempname".o 2>/dev/null
}
check_libc_is_glibc() {
local tempname="/tmp/temp.$$.$RANDOM.c"
local tempname="/tmp/temp.$$.$RANDOM"
echo "\
#include <stdlib.h>
/* Apparently uclibc defines __GLIBC__ (compat trick?). Oh well. */
@ -63,12 +67,12 @@ check_libc_is_glibc() {
syntax error here
#endif
" >"$tempname"
if $CC "$tempname" -c -o /dev/null >/dev/null 2>&1; then
if $CC "$tempname".c -c -o "$tempname".o >/dev/null 2>&1; then
echo "$2";
else
echo "$1";
fi
rm "$tempname"
rm "$tempname".c "$tempname".o 2>/dev/null
}
EXE="$1"