gnucobol: fix build with GCC 15 (#475950)

    substituteInPlace configure --replace-fail '"GNU strip"' 'FAKE GNU strip'

  '';

  # error: call to undeclared function 'xmlCleanupParser'

  # ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

  env.CFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-error=implicit-function-declaration";

  # GCC 15 changed some warnings to errors, particularly around function pointer types

  # (C23 empty parentheses means no args, not unspecified). These flags are needed

  # until gnucobol is updated to compile cleanly with GCC 15.

  # See: https://gcc.gnu.org/gcc-15/porting_to.html

  env.CFLAGS =

    let

      # Clang needs -Wno-error=implicit-function-declaration for xmlCleanupParser

      clangFlags = "-Wno-error=implicit-function-declaration";

      # GCC 15+ needs additional flags for incompatible pointer type errors

      gcc15Flags = "-Wno-error=incompatible-pointer-types -std=gnu11";

    in

    if stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "15.0.0" then

      gcc15Flags

    else if stdenv.cc.isClang then

      clangFlags

    else

      "";

  enableParallelBuilding = true;