Cygwin (gcc-11.4.0) fails to compile ciphers/sm4.c

[karel-m]

Just FYI, I will try to create a pull request with a fix later.

gcc -Iltm -Iltc/headers -DLTC_SOURCE -DLTC_NO_TEST -DLTC_NO_PROTOTYPES -DLTM_DESC -DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -D_GNU_SOURCE -ggdb -O2 -pipe -Wall -Werror=format-security -D_FORTIFY_SOURCE=2 -fstack-protector-strong --param=ssp-buffer-size=4 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/build=/usr/src/debug/perl-5.36.3-1 -fdebug-prefix-map=/mnt/share/cygpkgs/perl/perl.x86_64/src/perl-5.36.3=/usr/src/debug/perl-5.36.3-1 -fwrapv -fno-strict-aliasing   -O3  -msse4.1 -maes -Wall -Werror -Wextra -DARGTYPE=4 -c ltc/ciphers/sm4.c -o ltc/ciphers/sm4.o
In file included from ltc/headers/tomcrypt.h:12,
                 from ltc/headers/tomcrypt_private.h:4,
                 from ltc/ciphers/sm4.c:18:
ltc/ciphers/sm4.c:140:29: error: expected identifier or ‘(’ before numeric constant
  140 | LTC_INLINE static sm4_u32_t _L(sm4_u32_t B)
      |                             ^~
ltc/ciphers/sm4.c: In function ‘_T’:
ltc/ciphers/sm4.c:150:12: error: called object is not a function or function pointer
  150 |     return _L(t(Z));
      |            ^~
ltc/ciphers/sm4.c:151:1: error: control reaches end of non-void function [-Werror=return-type]
  151 | }
      | ^
At top level:
ltc/ciphers/sm4.c:287:12: error: ‘sm4_self_test_ltc’ defined but not used [-Werror=unused-function]
  287 | static int sm4_self_test_ltc(void)
      |            ^~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[1]: *** [Makefile:199: ltc/ciphers/sm4.o] Error 1

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/11/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with: /mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-11.4.0/configure --srcdir=/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-11.4.0 --prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc --docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C --build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin --without-libiconv-prefix --without-libintl-prefix --libexecdir=/usr/lib --with-gcc-major-version-only --enable-shared --enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs --enable-bootstrap --enable-__cxa_atexit --with-dwarf2 --with-tune=generic --enable-languages=ada,c,c++,d,fortran,lto,objc,obj-c++,jit --enable-graphite --enable-threads=posix --enable-libatomic --enable-libgomp --enable-libquadmath --enable-libquadmath-support --disable-libssp --enable-libada --disable-symvers --disable-multilib --with-gnu-ld --with-gnu-as --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix --without-libintl-prefix --with-system-zlib --enable-linker-build-id --with-default-libstdcxx-abi=gcc4-compatible --enable-libstdcxx-filesystem-ts
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.4.0 (GCC)

[sjaeckel]

Closed via #664