[Buildroot] [PATCH 1/1] Makefile: change order of libraries to fix linking issue

[Arnout Vandecappelle]

 Hi Eric,

 Thanks for your patch.

 The subject should be:

<package>: <what changed>

so in this case:

pifmrds: fix static linking

On 02/24/16 21:55, Eric Limpens wrote:
> When building a static variant, link errors occur. Changing the order
> of libsndfile and libm fixes this error

 Add a reference to the autobuild failure.

> 
> Signed-off-by: Eric Limpens <limpens at gmail.com>
> ---
>  package/pifmrds/0003-Makefile-fix-static-link-libm.patch | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>  create mode 100644 package/pifmrds/0003-Makefile-fix-static-link-libm.patch
> 
> diff --git a/package/pifmrds/0003-Makefile-fix-static-link-libm.patch b/package/pifmrds/0003-Makefile-fix-static-link-libm.patch
> new file mode 100644
> index 0000000..eb9cdcf
> --- /dev/null
> +++ b/package/pifmrds/0003-Makefile-fix-static-link-libm.patch
> @@ -0,0 +1,15 @@

 The patch should contain an explanation, just like a commit log. It should also
have your Signed-off-by.

 Also, because upstream uses git, it's convenient to have the patches in git
format. It would also be convenient if you could try to upstream the patches, so
then they should obviously be git-formatted.

> +--- pifmrds-0bf57f9ce0d954365a38d8af8e7be6f28521c3f2.orig/src/Makefile	2016-02-24 10:23:41.455695546 +0100
> ++++ pifmrds-0bf57f9ce0d954365a38d8af8e7be6f28521c3f2/src/Makefile	2016-02-24 10:25:07.003876714 +0100
> +@@ -1,10 +1,10 @@
> + CC = gcc
> + 
> + app: rds.o waveforms.o pi_fm_rds.o fm_mpx.o control_pipe.o
> +-	$(CC) $(LDFLAGS) -o pi_fm_rds rds.o waveforms.o pi_fm_rds.o fm_mpx.o control_pipe.o -lm -lsndfile
> ++	$(CC) $(LDFLAGS) -o pi_fm_rds rds.o waveforms.o pi_fm_rds.o fm_mpx.o control_pipe.o -lsndfile -lm

 Not for you Eric, but:

 I was going to suggest to use pkg-config here, but it turns out that libsndfile
itself forgets to add -lm to Libs.private, so that wouldn't help...

 Regards,
 Arnout

> + 
> + rds_wav: rds.o waveforms.o rds_wav.o fm_mpx.o
> +-	$(CC) $(LDFLAGS) -o rds_wav rds_wav.o rds.o waveforms.o fm_mpx.o -lm -lsndfile
> ++	$(CC) $(LDFLAGS) -o rds_wav rds_wav.o rds.o waveforms.o fm_mpx.o -lsndfile -lm
> + 
> + rds.o: rds.c waveforms.h
> + 	$(CC) $(CFLAGS) rds.c
> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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