Failed compilation of libcerf: any hints?

[Mojca Miklavec]

On Wed, Jul 17, 2013 at 4:35 PM, Joshua Root wrote:
> On 2013-7-17 22:42 , Mojca Miklavec wrote:
>> Hi,
>>
>> I took the liberty to submit my first port to SVN, libcerf, which will
>> also be the dependency of (one of) the next version(s) of gnuplot. I
>> hope that is OK. The buildbot for Snow Leopard reports an error, but
>> I'm unable to interpret it myself. Any hints or help are welcome. The
>> wiki seems down, so maybe that is somehow related.
>>
>> https://build.macports.org/builders/buildports-snowleopard-x86_64/builds/18815
>
> <https://build.macports.org/builders/buildports-snowleopard-x86_64/builds/18815/steps/compile/logs/stdio/text>
> says:
> w_of_z.c:84:40: error: imaginary constants are a GCC extension
>
> So it looks like it shouldn't be using -pedantic and -Werror together.

The author replied (please CC him if you have any further questions):

2013/7/17 j.wuttke:
> http://gcc.gnu.org/gcc-4.2/c99status.html is pretty clear:
>
> complex (and imaginary) support in <complex.h> => Broken
>
> - Joachim

On Wed, Jul 17, 2013 at 3:51 PM, j.wuttke wrote:
> Dear Mojca,
>
> this compiler issue is not easy.
> With gcc-4.7 I get not a single warning.
>
> Could you please show me the output generated
> by the command "make", when starting a fresh
> compilation? I would like to see how configure
> expands the command $(CC) on your system.

I don't have access to Mac OS X 10.6, at least not at the moment.

I don't have access to that specific computer, but you can see the
complete log here:
    https://build.macports.org/builders/buildports-snowleopard-x86_64/builds/18815/steps/compile/logs/stdio

checking for gcc... /usr/bin/gcc-4.2
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/gcc-4.2 accepts -g... yes
checking for /usr/bin/gcc-4.2 option to accept ISO C89... none needed
checking dependency style of /usr/bin/gcc-4.2... gcc3
checking for a sed that does not truncate output... /usr/bin/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by /usr/bin/gcc-4.2...
/usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld
...
and make:
...

make[2]: Entering directory
`/opt/local/var/macports/build/_opt_mports_dports_math_libcerf/libcerf/work/libcerf-1.3/lib'
/bin/sh ../libtool  --tag=CC   --mode=compile /usr/bin/gcc-4.2
-std=gnu99 -DHAVE_CONFIG_H -I. -I..   -I/opt/local/include -pedantic
-Wall -Werror -pipe -O2 -arch x86_64 -MT im_w_of_x.lo -MD -MP -MF
.deps/im_w_of_x.Tpo -c -o im_w_of_x.lo im_w_of_x.c
/bin/sh ../libtool  --tag=CC   --mode=compile /usr/bin/gcc-4.2
-std=gnu99 -DHAVE_CONFIG_H -I. -I..   -I/opt/local/include -pedantic
-Wall -Werror -pipe -O2 -arch x86_64 -MT erfcx.lo -MD -MP -MF
.deps/erfcx.Tpo -c -o erfcx.lo erfcx.c
/bin/sh ../libtool  --tag=CC   --mode=compile /usr/bin/gcc-4.2
-std=gnu99 -DHAVE_CONFIG_H -I. -I..   -I/opt/local/include -pedantic
-Wall -Werror -pipe -O2 -arch x86_64 -MT w_of_z.lo -MD -MP -MF
.deps/w_of_z.Tpo -c -o w_of_z.lo w_of_z.c
/bin/sh ../libtool  --tag=CC   --mode=compile /usr/bin/gcc-4.2
-std=gnu99 -DHAVE_CONFIG_H -I. -I..   -I/opt/local/include -pedantic
-Wall -Werror -pipe -O2 -arch x86_64 -MT err_fcts.lo -MD -MP -MF
.deps/err_fcts.Tpo -c -o err_fcts.lo err_fcts.c
libtool: compile:  /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.
-I.. -I/opt/local/include -pedantic -Wall -Werror -pipe -O2 -arch
x86_64 -MT im_w_of_x.lo -MD -MP -MF .deps/im_w_of_x.Tpo -c im_w_of_x.c
 -fno-common -DPIC -o .libs/im_w_of_x.o
libtool: compile:  /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.
-I.. -I/opt/local/include -pedantic -Wall -Werror -pipe -O2 -arch
x86_64 -MT w_of_z.lo -MD -MP -MF .deps/w_of_z.Tpo -c w_of_z.c
-fno-common -DPIC -o .libs/w_of_z.o
libtool: compile:  /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.
-I.. -I/opt/local/include -pedantic -Wall -Werror -pipe -O2 -arch
x86_64 -MT erfcx.lo -MD -MP -MF .deps/erfcx.Tpo -c erfcx.c
-fno-common -DPIC -o .libs/erfcx.o
libtool: compile:  /usr/bin/gcc-4.2 -std=gnu99 -DHAVE_CONFIG_H -I.
-I.. -I/opt/local/include -pedantic -Wall -Werror -pipe -O2 -arch
x86_64 -MT err_fcts.lo -MD -MP -MF .deps/err_fcts.Tpo -c err_fcts.c
-fno-common -DPIC -o .libs/err_fcts.o
w_of_z.c:84:40: error: imaginary constants are a GCC extension
w_of_z.c:176:43: error: imaginary constants are a GCC extension
w_of_z.c:180:59: error: imaginary constants are a GCC extension
w_of_z.c:225:45: error: imaginary constants are a GCC extension

-----------------
>> (The other two buildbots throw a warning that I wasn't able to
>> interpret either.)
>
> You mean this?
> libtool: install: warning: remember to run `libtool --finish /opt/local/lib'
>
> The warnings log just scans for any lines containing "warning". There's
> no guarantee they actually indicate a problem.

Yes. I noticed it in the meantime.

Mojca