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Date: Fri, 24 Jul 2020 16:33:56 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: Érico Rolim <ericonr@...root.org>
Cc: musl@...ts.openwall.com
Subject: Re: [PATCH] Makefile: fix src/api compilation.
* Érico Rolim <ericonr@...root.org> [2020-07-23 00:44:33 -0300]:
> Adding all .o files in src/api to the api/main.OBJ variable led to them
> being included twice when linking api/main.exe, which failed with a
> double definition of the main() function. This can be tested by removing
> the failing definitions from unistdc.c and running make.
thanks.
> ---
>
> This is a patch for libc-test.
>
> Makefile | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index 86b6ff5..683c850 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -113,7 +113,6 @@ $(B)/common/mtest.o: src/common/mtest.h
> $(math.OBJS): src/common/mtest.h
>
> $(B)/api/main.exe: $(api.OBJS)
> -api/main.OBJS:=$(api.OBJS)
> $(api.OBJS):$(B)/common/options.h
> $(api.OBJS):CFLAGS+=-pedantic-errors -Werror -Wno-unused -D_XOPEN_SOURCE=700
this is not the right fix,
the problem is that api/main.o is duplicated:
once because of the %.exe: %.o rule and once
in the api/main.OBJS.
but all other api/*.o files are not duplicated
and should be linked (so we link test all
referenced symbols not just include header test).
i'm considering doing
$(B)/%.exe: $(B)/%.o
- $(CC) $(LDFLAGS) $($*.LDFLAGS) -o $@ $< $($*.OBJS) $(LDLIBS) $($*.LDLIBS) 2>$@....err || echo BUILDERROR $@; cat $@....err
+ $(CC) $(LDFLAGS) $($*.LDFLAGS) -o $@ $(sort $< $($*.OBJS)) $(LDLIBS) $($*.LDLIBS) 2>$@....err || echo BUILDERROR $@; cat $@....err
(note: the make sort function removes duplicates)
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