ifm: fix build with gcc 15 (#517615)

2026-05-07 14:11:08 +00:00
parent 99c3a2f917 8840e744af
commit b05e90d85b
1 changed files with 2 additions and 1 deletions
@@ -38,7 +38,8 @@ stdenv.mkDerivation (finalAttrs: {
  # Workaround build failure on -fno-common toolchains:
  #   ld: libvars.a(vars-freeze-lex.o):src/libvars/vars-freeze-lex.l:23:
  #     multiple definition of `line_number'; ifm-main.o:src/ifm-main.c:46: first defined here
-  env.NIX_CFLAGS_COMPILE = "-fcommon";
+  # gnu17: libvars uses K&R-style () prototypes; C23 redefines them as (void).
+  env.NIX_CFLAGS_COMPILE = "-fcommon -std=gnu17";

  enableParallelBuilding = false; # ifm-scan.l:16:10: fatal error: ifm-parse.h: No such file or directory