On some archs libgcrypt fails to build from source with gcc-15. Helmut Grohne writes:
libgcrypt20 fails to build from source with gcc-15 for some
architectures. The cause may be found in mpi/longlong.h. In several
lines such as 193, 499 and 1409, there are function prototypes without
arguments. This trips up the updated language standard by gcc-15 and
building libcrypt20 now complains about excess arguments. For example:
In file included from ../../mpi/mpih-div.c:32:
../../mpi/mpih-div.c: In function ‘_gcry_mpih_mod_1’:
../../mpi/longlong.h:190:11: error: too many arguments to function ‘__udiv_qrnnd’; expected 0, have 4
190 | (q) = __udiv_qrnnd (&__r, (n1), (n0), (d)); \
| ^~~~~~~~~~~~ ~~~~
../../mpi/mpih-div.c:84:17: note: in expansion of macro ‘udiv_qrnnd’
84 | udiv_qrnnd(divisor_limb_inverted, dummy,
| ^~~~~~~~~~
../../mpi/longlong.h:193:16: note: declared hereThis does not seem to affect amd64 as Matthias would have otherwise
reported this problem already. It does affect at least alpha.
I do not see this on arm64, powerpc64le shows a different issue:
libtool: link: ( cd ".libs" && rm -f "libgcrypt.la" && ln -s "../libgcrypt.la" "libgcrypt.la" ) /bin/bash ../libtool --tag=CC --mode=link gcc-15 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/home/ametzler/GCR/libgcrypt20-1.11.1=. -fstack-protector-strong -Wformat -Werror=format-security -fvisibility=hidden -fno-delete-null-pointer-checks -Wall -Wl,-z,relro -Wl,-z,now -o mpicalc mpicalc-mpicalc.o libgcrypt.la -L/usr/lib/powerpc64le-linux-gnu -lgpg-error libtool: link: gcc-15 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/home/ametzler/GCR/libgcrypt20-1.11.1=. -fstack-protector-strong -Wformat -Werror=format-security -fvisibility=hidden -fno-delete-null-pointer-checks -Wall -Wl,-z -Wl,relro -Wl,-z -Wl,now -o .libs/mpicalc mpicalc-mpicalc.o ./.libs/libgcrypt.so -L/usr/lib/powerpc64le-linux-gnu -lgpg-error /usr/bin/ld: ./.libs/libgcrypt.so: undefined reference to `gcry_poly1305_p10le_4blocks' /usr/bin/ld: ./.libs/libgcrypt.so: undefined reference to `_gcry_chacha20_p10le_8x' collect2: error: ld returned 1 exit status make[3]: *** [Makefile:662: mpicalc] Error 1 make[3]: Leaving directory '/home/ametzler/GCR/libgcrypt20-1.11.1/build/src'
Comparing the buildlogs for gcc14 and 15 on this arch shows no errors/warnings, I was surprised that support for "checking whether GCC inline assembler supports PowerISA 3.00 instructions." stopped succeeding with gcc-15.