On Wed, Jun 1, 2016 at 1:00 AM, Kain Abel <isoru...@gmail.com> wrote:
> I've slightly modified your line from the top: > lm@um:~/src/fossil$ gcc -c -pedantic -I./src -Wall -Werror -fPIC > -Wstrict-aliasing -g -Wno-long-long -std=c89 ./src/cson_amalgamation.c > -DFOSSIL_ENABLE_JSON -Og > lm@um:~/src/fossil$ gcc -c -pedantic -I./src -Wall -Werror -fPIC > -Wstrict-aliasing -g -Wno-long-long -std=c89 ./src/cson_amalgamation.c > -DFOSSIL_ENABLE_JSON -O1 > lm@um:~/src/fossil$ gcc -c -pedantic -I./src -Wall -Werror -fPIC > -Wstrict-aliasing -g -Wno-long-long -std=c89 ./src/cson_amalgamation.c > -DFOSSIL_ENABLE_JSON -O2 > ./src/cson_amalgamation.c: In function ‘cson_value_new_integer’: > ./src/cson_amalgamation.c:2863:13: error: dereferencing type-punned > pointer will break strict-aliasing rules [-Werror=strict-aliasing] > *CSON_INT(c) = v; > ^ > cc1: all warnings being treated as errors > lm@um:~/src/fossil$ gcc -c -pedantic -I./src -Wall -Werror -fPIC > -Wstrict-aliasing -g -Wno-long-long -std=c89 ./src/cson_amalgamation.c > -DFOSSIL_ENABLE_JSON -Os > ./src/cson_amalgamation.c: In function ‘cson_value_new_integer’: > ./src/cson_amalgamation.c:2863:13: error: dereferencing type-punned > pointer will break strict-aliasing rules [-Werror=strict-aliasing] > *CSON_INT(c) = v; > ^ > cc1: all warnings being treated as errors > > The same thing happens with a GCC 4.8 by the switching of the > optimizer flags (or to -std=c99). > aha! i will take a look at it as soon as i am capable of emacsing with 2 hand again. i'm not sure how that can be resolved without fundamental code changes, as it's a side-effect of allocating a cson_value and integer in the same block of memory (that macro accesses the integer part of that memory block). -- ----- stephan beal http://wanderinghorse.net/home/stephan/ http://gplus.to/sgbeal "Freedom is sloppy. But since tyranny's the only guaranteed byproduct of those who insist on a perfect world, freedom will have to do." -- Bigby Wolf
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