[mesa-users] Compiler error with latest SDK and r7624

[Bill Paxton]

minor point --- FCchecks is only used when doing certain tests of the code
COMPILE_TO_TEST   = $(COMPILE_BASIC) $(FCwarn) $(FCimpno) $(FCchecks) $(FCopt) $(FCdebug) -c

during normal builds, we do this instead
COMPILE_TO_DEPLOY = $(COMPILE_BASIC) $(FCwarn) $(FCimpno) $(FCopt) -c

where
COMPILE_BASIC_FLAGS = $(FCbasic) $(FCopenmp) $(FCstatic) $(INCLUDES)
COMPILE_BASIC = $(FC) $(COMPILE_BASIC_FLAGS)

so i think you should add  -Wno-uninitialized to FCbasic rather than to FCchecks.

cheers,
b





On Jun 15, 2016, at 8:34 AM, RICHARD H D TOWNSEND wrote:

> Hi Warrick —
> 
> This is a false positive on the part of the compiler — in fact, there’s nothing wrong with the code. To get things to compile, edit utils/makefile_header and add ‘-Wno-maybe-uninitialized’ to the FCchecks variable.
> 
> cheers,
> 
> Rich
> 
>> On Jun 15, 2016, at 9:38 AM, Warrick Ball <wball at astro.physik.uni-goettingen.de> wrote:
>> 
>> Hi all,
>> 
>> I tried upgrading my MESA SDK from the 20150908 release to the 20160129 release and immediately ran into trouble when recompiling MESA r7624.  I don't have a problem installing r8118, so I guess this this might be moot. And I apologize if I've missed that this is a known issue.  It looks like a fairly benign error but I haven't looked into it (since I'm happy to stick to the older SDK).
>> 
>> The error output is (log of STDOUT is attached as r7624.log):
>> 
>> ../private/net_burn_const_p.f90:473:0:
>> 
>>                  rpar(r_burn_const_P_time_eos) + dble(time1 - time0) / clock_rate
>> ^
>> Error: 'time0' may be used uninitialized in this function [-Werror=maybe-uninitialized]
>> f951: all warnings being treated as errors
>> make: *** [net_burn_const_p.o] Error 1
>> makefile:61: recipe for target 'net_burn_const_p.o' failed
>> 
>> /home/astro84/wball/work/compile_test/mesa-r7624/net/make
>> FAILED
>> 
>> /home/astro84/wball/work/compile_test/mesa-r7624/net
>> ./build_and_test FAILED
>> 
>> Some system info:
>> 
>> $ uname -a
>> Linux astro84 4.1.15-8-default #1 SMP PREEMPT Wed Jan 20 16:41:00 UTC 2016 (0e3b3ab) x86_64 x86_64 x86_64 GNU/Linux
>> 
>> $ gfortran -v
>> Using built-in specs.
>> COLLECT_GCC=/home/astro84/wball/mesa/sdk_20160129/bin/gfortran.exec
>> COLLECT_LTO_WRAPPER=/home/astro84/wball/mesa/sdk_20160129/bin/../libexec/gcc/x86_64-pc-linux-gnu/5.3.1/lto-wrapper
>> Target: x86_64-pc-linux-gnu
>> Configured with: /root/mesasdk-src/gcc/configure CC=gcc --build=x86_64-pc-linux-gnu --prefix=/root/mesasdk --with-gmp=/root/mesasdk --with-mpfr=/root/mesasdk --with-mpc=/root/mesasdk --enable-languages=c,c++,fortran --disable-multilib --disable-nls --disable-libsanitizer --enable-clocale=generic
>> Thread model: posix
>> gcc version 5.3.1 20160129 (GCC)
>> 
>> 
>> Cheers,
>> Warrick
>> 
>> 
>> 
>> ------------
>> Warrick Ball
>> Postdoc, Institut für Astrophysik Göttingen
>> wball at astro.physik.uni-goettingen.de
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