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| author | Kaz Kylheku <kaz@kylheku.com> | 2017-03-31 06:12:53 -0700 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2017-03-31 06:12:53 -0700 |
| commit | 118cff9ecb669e0beea65ca9a31357d643ee3d27 (patch) | |
| tree | 9dc43c96e7cc84b349a80eb32e42077ee70c99b7 /Makefile | |
| parent | 0fe9b6ac5cc2f57275dcaf721636b7a365e9b3fd (diff) | |
| download | txr-118cff9ecb669e0beea65ca9a31357d643ee3d27.tar.gz txr-118cff9ecb669e0beea65ca9a31357d643ee3d27.tar.bz2 txr-118cff9ecb669e0beea65ca9a31357d643ee3d27.zip | |
build: defend against $(top_srcdir) interference.
* Makefile (tainted): New top target added in a situation
when an out-of-tree build is tainted by a configuration
in the original tree. The problem is that .c files which
have an #include "y.tab.h" or #include "config.h" get
these headers from the same directory where they reside.
This is processed ahead of any -iquote directories.
If a "config.h" exists in $(top_srcdir), files include
that in spite of "-iquote ." on the compiler command line.
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -170,6 +170,17 @@ notconfigured: $(V)exit 1 endif +ifneq ($(top_srcdir),) +ifneq ($(wildcard $(top_srcdir)/config.h $(top_srcdir)/y.tab.h),) +.PHONY: tainted +tainted: + $(V)echo "Source directory $(top_srcdir) is in a configured state." + $(V)echo "Generated files there with interfere with the build here." + $(V)echo "Please do a \"make distclean\" in $(top_srcdir) first." + $(V)exit 1 +endif +endif + .PHONY: all all: $(BUILD_TARGETS) |