Unpin Amiga compiler

.github/workflows/amiga-m68k.yml

@@ -24,7 +24,7 @@ concurrency:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: amigadev/crosstools:m68k-amigaos-gcc10@sha256:e0ee27eb4174ba8f95143273dd2ecb0ffa23ca6a195e013030a681ab541b4a37
+    container: amigadev/crosstools:m68k-amigaos-gcc10
     steps:
       - name: Checkout
         uses: actions/checkout@v7

Packaging/amiga/prep.sh

@@ -24,6 +24,21 @@ cd deps
 wget https://github.com/AmigaPorts/libSDL12/archive/master.tar.gz -O SDL-1.2.tar.gz
 tar -xvf SDL-1.2.tar.gz
 cd libSDL12-master
+# GCC 14+ promotes several legacy-C conformance warnings to hard errors by
+# default (implicit-function-declaration, implicit-int, int-conversion,
+# incompatible-pointer-types, return-mismatch, etc). This codebase predates
+# that change and trips all of them; downgrade back to warnings so it still
+# builds on newer GCC. Some of these warning names don't exist before GCC 14
+# at all, so -Wno-error=<name> is a hard "unrecognized option" error on
+# older GCC rather than a no-op -- gate this on the actual compiler version
+# rather than applying it unconditionally.
+# Appended at end-of-file rather than a specific line, since this Makefile
+# is fetched from the upstream master branch and its exact contents can
+# change; Make variable assignments apply regardless of where they appear.
+GCC_MAJOR_VERSION="$(m68k-amigaos-gcc -dumpversion | cut -d. -f1)"
+if [ "$GCC_MAJOR_VERSION" -ge 14 ]; then
+	printf '\nGCCFLAGS += -Wno-error=implicit-function-declaration -Wno-error=implicit-int -Wno-error=int-conversion -Wno-error=incompatible-pointer-types -Wno-error=return-mismatch -Wno-error=return-type -Wno-error=pointer-sign -Wno-error=pointer-to-int-cast -Wno-error=int-to-pointer-cast\n' >> Makefile
+fi
 make PREFX=${SYSROOT} PREF=${SYSROOT} -j"$PARALLELISM"
 mkdir -p ${SYSROOT}/usr/lib
 mkdir -p ${SYSROOT}/usr/include