0a4624aec
Denis Vlasenko
2008-02-13
Subject
build system: don't use -o /dev/null, old gcc can delete /dev/null!
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Commit Diff GitHub →
scripts/trylink+8 -4
| @@ -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" | |