Build with `-Werror` fails: `arg_int.c: warning: passing argument 3 of ‘strtol0X’ with different width due to prototype`

[barracuda156]

[ 18%] Building C object src/CMakeFiles/argtable3.dir/arg_end.c.o
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cd /opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/build/tests && /usr/bin/gcc-4.2  -I/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src -pipe -Os -DNDEBUG -I/opt/local/include -arch ppc -mmacosx-version-min=10.6 -MD -MT tests/CMakeFiles/test_src.dir/testargrex.c.o -MF CMakeFiles/test_src.dir/testargrex.c.o.d -o CMakeFiles/test_src.dir/testargrex.c.o -c /opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/tests/testargrex.c
[ 22%] Building C object src/CMakeFiles/argtable3.dir/arg_hashtable.c.o
cd /opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/build/src && /usr/bin/gcc-4.2 -D_XOPEN_SOURCE=700 -Dargtable3_EXPORTS -I/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src -pipe -Os -DNDEBUG -I/opt/local/include -std=c89 -Wconversion -Wextra -Wall -Werror -pedantic -arch ppc -mmacosx-version-min=10.6 -fPIC -MD -MT src/CMakeFiles/argtable3.dir/arg_hashtable.c.o -MF CMakeFiles/argtable3.dir/arg_hashtable.c.o.d -o CMakeFiles/argtable3.dir/arg_hashtable.c.o -c /opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src/arg_hashtable.c
[ 23%] Building C object tests/CMakeFiles/test_src.dir/testargdstr.c.o
cd /opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/build/tests && /usr/bin/gcc-4.2  -I/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src -pipe -Os -DNDEBUG -I/opt/local/include -arch ppc -mmacosx-version-min=10.6 -MD -MT tests/CMakeFiles/test_src.dir/testargdstr.c.o -MF CMakeFiles/test_src.dir/testargdstr.c.o.d -o CMakeFiles/test_src.dir/testargdstr.c.o -c /opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/tests/testargdstr.c
[ 25%] Building C object src/CMakeFiles/argtable3.dir/arg_int.c.o
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[ 27%] Building C object tests/CMakeFiles/test_src.dir/CuTest.c.o
cc1: warnings being treated as errors
/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src/arg_int.c: In function ‘arg_int_scanfn’:
/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src/arg_int.c:157: warning: passing argument 3 of ‘strtol0X’ with different width due to prototype
/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src/arg_int.c:160: warning: passing argument 3 of ‘strtol0X’ with different width due to prototype
/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/argtable3-3.3.1/src/arg_int.c:163: warning: passing argument 3 of ‘strtol0X’ with different width due to prototype
make[2]: *** [src/CMakeFiles/argtable3.dir/arg_int.c.o] Error 1
make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_ppcports_devel_argtable3/argtable3/work/build'
make[1]: *** [src/CMakeFiles/argtable3.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

[tomghuang]

Hi @barracuda156 , could you please let me know how to reproduce this issue? What compiler and which version do you use? I'd like to add a CI workflow to make sure that this issue won't happen again. Thanks.

[barracuda156]

Hi @barracuda156 , could you please let me know how to reproduce this issue? What compiler and which version do you use? I'd like to add a CI workflow to make sure that this issue won't happen again. Thanks.

This only happened with the Xcode gcc 4.2, so there is no easy way to test that on CI. After dropping -Werror gcc-4.2 can compile the code, while gcc14 builds it fine in either case.