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makefile: canonicalize path when compiling 

Compilers store the path with which they were called in the debug
symbols. Therefore, this will make backtraces show something like
../i3-4.2/src/main.c instead of src/main.c.

See also http://stackoverflow.com/questions/6473561/
This commit is contained in:
Michael Stapelberg 2012-08-05 17:00:24 +02:00
parent 952e5b6059
commit 48f1e383ca
1 changed files with 12 additions and 4 deletions
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16
src/i3.mk
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@ -21,21 +21,29 @@ endif
i3_OBJECTS := $(i3_SOURCES_GENERATED:.c=.o) $(i3_SOURCES:.c=.o) i3_OBJECTS := $(i3_SOURCES_GENERATED:.c=.o) $(i3_SOURCES:.c=.o)
# The basename/readlink calls are for canonicalizing the path: Instead
# of src/main.c, we will see something like ../i3-4.2/src/main.c in
# debugger backtraces, making it clearer which code belongs to i3 and
# which code doesn’t.
# We only do this for src/ since all the other subdirectories contain i3 in
# their name already.
canonical_path := ../$(shell basename $(shell readlink -f .))
include/all.h.pch: $(i3_HEADERS) include/all.h.pch: $(i3_HEADERS)
echo "[i3] PCH all.h" echo "[i3] PCH all.h"
$(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) -x c-header include/all.h -o include/all.h.pch $(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) -x c-header include/all.h -o include/all.h.pch
src/%.o: src/%.c $(i3_HEADERS_DEP) src/%.o: src/%.c $(i3_HEADERS_DEP)
echo "[i3] CC $<" echo "[i3] CC $<"
$(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) $(PCH_FLAGS) -c -o $@ $< $(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) $(PCH_FLAGS) -c -o $@ ${canonical_path}/$<
src/cfgparse.yy.c: src/cfgparse.l src/cfgparse.tab.o $(i3_HEADERS_DEP) src/cfgparse.yy.c: src/cfgparse.l src/cfgparse.tab.o $(i3_HEADERS_DEP)
echo "[i3] LEX $<" echo "[i3] LEX $<"
$(FLEX) -i -o $@ $< $(FLEX) -i -o $@ ${canonical_path}/$<
src/cfgparse.tab.c: src/cfgparse.y $(i3_HEADERS_DEP) src/cfgparse.tab.c: src/cfgparse.y $(i3_HEADERS_DEP)
echo "[i3] YACC $<" echo "[i3] YACC $<"
$(BISON) --debug --verbose -b $(basename $< .y) -d $< $(BISON) --debug --verbose -b $(basename $< .y) -d ${canonical_path}/$<
# This target compiles the command parser twice: # This target compiles the command parser twice:
# Once with -DTEST_PARSER, creating a stand-alone executable used for tests, # Once with -DTEST_PARSER, creating a stand-alone executable used for tests,
@ -43,7 +51,7 @@ src/cfgparse.tab.c: src/cfgparse.y $(i3_HEADERS_DEP)
src/commands_parser.o: src/commands_parser.c $(i3_HEADERS_DEP) i3-command-parser.stamp src/commands_parser.o: src/commands_parser.c $(i3_HEADERS_DEP) i3-command-parser.stamp
echo "[i3] CC $<" echo "[i3] CC $<"
$(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) $(I3_LDFLAGS) $(LDFLAGS) -DTEST_PARSER -o test.commands_parser $< $(i3_LIBS) $(LIBS) $(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) $(I3_LDFLAGS) $(LDFLAGS) -DTEST_PARSER -o test.commands_parser $< $(i3_LIBS) $(LIBS)
$(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) -c -o $@ $< $(CC) $(I3_CPPFLAGS) $(CPPFLAGS) $(i3_CFLAGS) $(I3_CFLAGS) $(CFLAGS) -c -o $@ ${canonical_path}/$<
i3-command-parser.stamp: generate-command-parser.pl parser-specs/commands.spec i3-command-parser.stamp: generate-command-parser.pl parser-specs/commands.spec
echo "[i3] Generating command parser" echo "[i3] Generating command parser"