Making all in Main
c++ -DHAVE_CONFIG_H -I. -I. -I../../src/Include -I../.. -I../../src
-I/usr/local/include -DPKGLIBDIR=\"/usr/local/lib/FlightGear\" -g -O1 -finline-limit-6
-finline-functions -Wall -pedantic -Wpointer-arith -c main.cxx
main.cxx: In function `void fgUpdateTimeDepCalcs()':
main.cxx:766: warning: unused variable `int i'
main.cxx: In function `void fgLoadDCS()':
main.cxx:1742: warning: unused variable `class ssgVertexArray * lights'
main.cxx:1746: warning: `int light_type' might be used uninitialized in this function
... and there are many others in other files.
I have realised that in order for warnings to be useful, it is no good for them just
to scroll past and then be lost until after the next "make clean". At work, I capture
the compiler output for each file and then display all the warnings and errors at the
end of the build. Not just those from the files that were compiled during the last
run of "make", but for all source files. I don't want to force everyone to see the
warnings if they don't want to, but I think we should provide a set-up that makes it
easy to do so.
Three things are needed:
1. Enable warnings. e.g.
GCCFLAGS="-g -O1 -Wall -pedantic -Wpointer-arith"
CFLAGS="$GCCFLAGS" CXXFLAGS="$GCCFLAGS" ./configure
2. Save the error output for each C file as (e.g.) ".deps/*.err". E.g. in each
Makefile.in:
%.o: %.cxx
@echo '$(CXXCOMPILE) -c $<'; \
- $(CXXCOMPILE) -Wp,-MD,.deps/$(*F).pp -c $< 2> .deps/$(*F).err
+ $(CXXCOMPILE) -Wp,-MD,.deps/$(*F).pp -c $< 2> .deps/$(*F).err
@-cp .deps/$(*F).pp .deps/$(*F).P; \
tr ' ' '\012' < .deps/$(*F).pp \
| sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
>> .deps/$(*F).P; \
- rm .deps/$(*F).pp
+ rm .deps/$(*F).pp; \
+ cat .deps/$(*F).err
3. Display the results (when?). e.g.
find . -type d -name .deps -exec cat {}/*.err \;
So, can anyone suggest good ways of doing each of these steps, especially step 2: how
do I get that change into every Makefile.in, or what would be a better way?
- Julian
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