Fix all the warnings.
Getting rid of "-Wno-unused-parameter" is quite complex because some
parameters usage depends on compilation variable (i.e.
`--enable-debug-messages`).
The "-Werror" flag has been added only in Travis builds to avoid
breaking the builds to users using uncommon/untested
OS/compiler/enviroment.
Tested on:
* x86_64; Ubuntu 20.04; gcc 7,8,9,10,11; clang 7,8,9,10,11,12
* x86_64; CentOS 7.7; gcc 4.8.5 (with "--disable-gcrypt" flag)
* Raspberry 4; Debian 10.10; gcc 8.3.0
* Added compiler search list for AC_PROG_CC, AM_PROG_CC_C_O, AC_PROG_CXX, AC_PROG_CC_STDC
for Mac OS X only
The list rendered the AX_CHECK_COMPILE_FLAG([-fsanitize=fuzzer]) useless as it did use
clang for AX_CHECK_COMPILE_FLAG but gcc during the compile process. Seems broken somehow.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
./tests/do.sh can supports SMP/MT via environment variables.
Removed -fno-sanitize=shift as well, was fixed by 317d3ffd.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
