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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 /mtools | |
| 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 'mtools')
| -rw-r--r-- | mtools/Makefile | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mtools/Makefile b/mtools/Makefile index 546e3d14..16d63a69 100644 --- a/mtools/Makefile +++ b/mtools/Makefile @@ -1,5 +1,7 @@ -gcc_ok = $(shell if gcc $(1) ../dummy.c -o /dev/null 2>/dev/null; \ - then echo '$(1)'; else echo '$(2)'; fi) +TMPFILE = $(shell mktemp /tmp/gcc_ok.XXXXXX) + +gcc_ok = $(shell tmpf=$(TMPFILE); if gcc $(1) ../dummy.c -o $$tmpf 2>/dev/null; \ + then echo '$(1)'; else echo '$(2)'; fi; rm -f $$tmpf) comma := , LDHASH := $(call gcc_ok,-Wl$(comma)--hash-style=both,) |