Public bug reported:

aflplusplus 4.21c-4ubuntu2 FTBFS in Questing

https://people.canonical.com/~ginggs/ftbfs-report/test-
rebuild-20250910-questing-questing.html

cc -g -O2 -Werror=implicit-function-declaration -fno-omit-frame-pointer 
-mno-omit-leaf-frame-pointer -ffile-prefix-map=/<<PKGBUILDDIR>>=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection 
-fdebug-prefix-map=/<<PKGBUILDDIR>>=/usr/src/aflplusplus-4.21c-4ubuntu2 -g 
-Wno-pointer-sign -Wno-variadic-macros -Wall -Wextra -Wno-pointer-arith -fPIC 
-I include/ -DAFL_PATH=\"/usr/lib/afl\" -DBIN_PATH=\"/usr/bin\" 
-DDOC_PATH=\"/usr/share/doc/afl\"  -flto  src/afl-showmap.c 
src/afl-fuzz-mutators.c src/afl-fuzz-python.c src/afl-common.o 
src/afl-sharedmem.o src/afl-forkserver.o src/afl-performance.o -o afl-showmap 
-DUSE_PYTHON -I/usr/include/python3.13 -I/usr/include/python3.13 
-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -ldl -lrt -lm -lpython3.13 
-ldl  -lm  -L/usr/lib/python3.13/config-3.13-x86_64-linux-gnu 
-L/usr/lib/x86_64-linux-gnu -lpython3.13 -ldl  -lm  -DPYTHON_VERSION="\"Python 
3.13.7\"" -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -ldl -lrt -lm
src/afl-showmap.c: In function ‘showmap_run_target’:
src/afl-showmap.c:635:21: error: passing argument 2 of ‘signal’ from 
incompatible pointer type [-Wincompatible-pointer-types]
  635 |     signal(SIGALRM, kill_child);
      |                     ^~~~~~~~~~
      |                     |
      |                     void (*)(void)
In file included from include/afl-fuzz.h:55,
                 from src/afl-showmap.c:36:
/usr/include/signal.h:88:57: note: expected ‘__sighandler_t’ {aka ‘void 
(*)(int)’} but argument is of type ‘void (*)(void)’
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                                          ~~~~~~~~~~~~~~~^~~~~~~~~
src/afl-showmap.c:134:13: note: ‘kill_child’ declared here
  134 | static void kill_child() {
      |             ^~~~~~~~~~
/usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here
   72 | typedef void (*__sighandler_t) (int);
      |                ^~~~~~~~~~~~~~
make[2]: *** [GNUmakefile:478: afl-showmap] Error 1

** Affects: aflplusplus (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ftbfs update-excuse

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https://bugs.launchpad.net/bugs/2142886

Title:
  aflplusplus: FTBFS in Questing

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