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| author | Luciano Rocha <strange@nsk.no-ip.org> | 2007-05-23 21:50:16 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2007-05-25 15:01:09 -0700 |
| commit | 1d81d5e3944dd5ac912150bc705fa7259eade541 (patch) | |
| tree | e2b2854cb4c660521d4e3b413c944816daaa800e /sample/Makefile | |
| parent | 7f2f6e3cec8eca7710acdd0b82b095834aecd400 (diff) | |
| download | syslinux-1d81d5e3944dd5ac912150bc705fa7259eade541.tar.gz | |
Don't clobber /dev/null when compiling as root
Compiling as root is highly discouraged, but some people do it anyway.
gcc_ok, however, can clobber /dev/null due to "-o /dev/null"; this is
bad. Instead, write a temporary file and delete it.
Diffstat (limited to 'sample/Makefile')
| -rw-r--r-- | sample/Makefile | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sample/Makefile b/sample/Makefile index f301b9f1..cc22a984 100644 --- a/sample/Makefile +++ b/sample/Makefile @@ -14,8 +14,10 @@ ## samples for syslinux users ## -gcc_ok = $(shell if gcc $(1) -c -x c /dev/null -o /dev/null 2>/dev/null; \ - then echo $(1); else echo $(2); fi) +TMPFILE = $(shell mktemp /tmp/gcc_ok.XXXXXX) + +gcc_ok = $(shell tmpf=$(TMPFILE); if gcc $(1) -c -x c /dev/null -o $$tmpf 2>/dev/null; \ + then echo $(1); else echo $(2); fi; rm -f $$tmpf) M32 := $(call gcc_ok,-m32,) $(call gcc_ok,-ffreestanding,) $(call gcc_ok,-fno-stack-protector,) |