From 68b77366cbb16ff237320cca7260909050c41a50 Mon Sep 17 00:00:00 2001 From: Ian Lynagh Date: Sat, 19 Dec 2009 14:58:08 +0000 Subject: [PATCH] Tweak the build-dependencies rule, and add comments for it --- rules/build-dependencies.mk | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/rules/build-dependencies.mk b/rules/build-dependencies.mk index 5f65e73..8f52bc5 100644 --- a/rules/build-dependencies.mk +++ b/rules/build-dependencies.mk @@ -83,11 +83,33 @@ endef # $3 = depfile # $4 = file # $5 = ways +# # The formatting of this definition (e.g. the blank line above) is # important, in order to get make to generate the right makefile code. +# +# "1s|\.o|\.$($w_osuf)|" +# We will have dependencies for .o files, so we need to fix them up +# for the right object suffix for the way we're doing +# "1s|^|$(dir $4)|" +# We always get deps for just foo.o when the file we're making is +# a/b/c/foo.o, so we need to prepend the directory of the source file +# "1s|$1/|$1/$2/build/|" +# Well, almost. We actually need to insert e.g. "dist/build" in the +# middle of that directory +# "1s|$2/build/$2/build|$2/build|g" +# But some source files, e.g. sm/Evac_thr.c, are also inside the +# "dist/build" directory, so now we've just made +# "dist/build/dist/build", so we need to remove the duplication +# again +# "s|$(TOP)/||gi" +# Finally, cpp -MM will give us full paths for some files, but this +# causes problems on Windows where make interprets the colon in +# c:/foo/bar.h as make syntax. So we sed off $(TOP) (case +# insensitively, as sometimes you get C:/... when you are expecting +# c:/... or vice versa) define addCFileDeps $(CPP) $($1_$2_MKDEPENDC_OPTS) $($1_$2_v_ALL_CC_OPTS) $($(basename $4)_CC_OPTS) -MM $4 -MF $3.bit - $(foreach w,$5,sed -e "1s|\.o|\.$($w_osuf)|" -e "1s|^|$(dir $4)|" -e "1s|$1/|$1/$2/build/|" -e "s|$(TOP)/||gi" -e "s|$2/build/$2/build|$2/build|g" $3.bit >> $3.tmp &&) true + $(foreach w,$5,sed -e "1s|\.o|\.$($w_osuf)|" -e "1s|^|$(dir $4)|" -e "1s|$1/|$1/$2/build/|" -e "1s|$2/build/$2/build|$2/build|g" -e "s|$(TOP)/||gi" $3.bit >> $3.tmp &&) true endef -- 1.7.10.4