gcc 14.1.0 turned -Wimplicit-function-declaration into an error: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=55e94561e97ed0bce4774aa1c6b5d5d82209a379
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=a1adce82c17577aeaaf6b9736ca8a1455d1164cb The bug report: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91092 The porting guide which includes a section on -Wimplicit-function-declaration: https://gcc.gnu.org/gcc-14/porting_to.html#implicit-function-declaration A way to reproduce the issue: $ docker run --rm alpine:3.21 sh -euxc ' apk add git build-base git clone https://git.savannah.gnu.org/git/bash.git cd bash git checkout 6794b5478f660256a1023712b5fc169196ed0a22 ./configure gcc --version make ' ... + gcc --version gcc (Alpine 14.2.0) 14.2.0 ... + make ... making lib/termcap/libtermcap.a in ./lib/termcap make[1]: Entering directory '/bash/lib/termcap' gcc -c -g -O2 -DHAVE_CONFIG_H -I. -I../.. -I../.. -I../../lib -I. termcap.c gcc -c -g -O2 -DHAVE_CONFIG_H -I. -I../.. -I../.. -I../../lib -I. tparam.c tparam.c: In function 'memory_out': tparam.c:67:3: error: implicit declaration of function 'write'; did you mean 'wprintf'? [-Wimplicit-function-declaration] 67 | write (2, "virtual memory exhausted\n", 25); | ^~~~~ | wprintf make[1]: *** [Makefile:56: tparam.o] Error 1 make[1]: Leaving directory '/bash/lib/termcap' make: *** [Makefile:702: lib/termcap/libtermcap.a] Error 1 Under alpine:3.20 (gcc 13.2.1) it builds. Regards, Yuri
