Add GCC14 fixup patches for older branches

It shouldn't break anything on current but it also shouldn't be necessary, so disable by default

Fix for https://github.com/Frogging-Family/nvidia-all/issues/236

PKGBUILD

@@ -331,6 +331,8 @@ source=($_source_name
         '60-nvidia.rules'
         'nvidia-tkg.hook'
         'nvidia-open-gcc-ibt-sls.diff'
+        'gcc-14-470.diff'
+        'gcc-14.diff'
         'linux-version.diff' # include linux version
         '01-ipmi-vm.diff' # ipmi & vm patch for older than 415.22 releases (2018.12.7) (396.xx)
         '02-ipmi-vm.diff' # ipmi & vm patch for older than 415.22 releases (2018.12.7) (addon for 410+)
@@ -383,6 +385,8 @@ md5sums=("$_md5sum"
          'd868c671fd7a542722a1889f5d38441d'
          '596f7cbf2db48d4f5b1c38967bb93cea'
          '9b1543768ea75320fd0d2315de66d1c8'
+         'afb98b1dab0c61df526d4c0ee4d18abf'
+         'e5d1574892eb68de9af1b79a6bfb5e7b'
          '7a825f41ada7e106c8c0b713a49b3bfa'
          'd961d1dce403c15743eecfe3201e4b6a'
          '14460615a9d4e247c8d9bcae8776ed48'
@@ -482,6 +486,11 @@ prepare() {
     PATH=${CUSTOM_GCC_PATH}/bin:${CUSTOM_GCC_PATH}/lib:${CUSTOM_GCC_PATH}/include:${PATH}
   fi
 
+  if [ "$_gcc14_fix" = "true" ] && [[ "$(gcc -dumpversion)" = 14* ]]; then
+    _gcc14="true"
+    msg2 "GCC 14 detected"
+  fi
+
   # Extract
   msg2 "Self-Extracting $_pkg.run..."
   sh "$_pkg".run -x
@@ -883,6 +892,17 @@ DEST_MODULE_LOCATION[3]="/kernel/drivers/video"' dkms.conf
         _whitelist68=(525*)
       fi
 
+      if [ "$_gcc14" = "true" ]; then
+        cd "$srcdir"/"$_pkg"/kernel-$_kernel
+        msg2 "Applying gcc-14 patch..."
+        if [[ $pkgver = 470* ]]; then
+          patch -Np2 -i "$srcdir"/gcc-14-470.diff
+        else
+          patch -Np2 -i "$srcdir"/gcc-14.diff
+        fi
+        cd ..
+      fi
+
       # Loop patches (linux-4.15.patch, lol.patch, ...)
       for _p in $(printf -- '%s\n' ${source[@]} | grep .patch); do  # https://stackoverflow.com/a/21058239/1821548
         # Patch version (4.15, "", ...)
@@ -1419,6 +1439,15 @@ DEST_MODULE_LOCATION[3]="/kernel/drivers/video"' dkms.conf
         fi
       fi
 
+      if [ "$_gcc14" = "true" ]; then
+        msg2 "Applying gcc-14 patch..."
+        if [[ $pkgver = 470* ]]; then
+          patch -Np1 -i "$srcdir"/gcc-14-470.diff
+        else
+          patch -Np1 -i "$srcdir"/gcc-14.diff
+        fi
+      fi
+
       # Legacy quirks
       if [ "$_oldstuff" = "1" ]; then
         msg2 "Applying 01-ipmi-vm.diff for dkms..."

customization.cfg

@@ -54,6 +54,9 @@ _dkms=""
 
 ## LEGACY OPTIONS
 
+# Enable GCC 14 fixup patch - Allows older branches to build on GCC14
+_gcc14_fix="false"
+
 # Attempt at fixing PRIME sync on kernel 5.4 and 5.5rc - https://devtalk.nvidia.com/default/topic/1068045/linux/5-4-kernel-breaks-prime-synchronization-/post/5416631/#5416631
 _54_prime_fixing_attempt="false"
 

patches/gcc-14-470.diff

@@ -0,0 +1,13 @@
+diff --git a/kernel-dkms/conftest.sh b/kernel-dkms/conftest.sh
+--- a/kernel-dkms/conftest.sh
++++ b/kernel-dkms/conftest.sh
+@@ -100,7 +100,8 @@ test_headers() {
+ build_cflags() {
+     BASE_CFLAGS="-O2 -D__KERNEL__ \
+ -DKBUILD_BASENAME=\"#conftest$$\" -DKBUILD_MODNAME=\"#conftest$$\" \
+--nostdinc -isystem $ISYSTEM"
++-nostdinc -isystem $ISYSTEM \
++-Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-incompatible-pointer-types"
+
+     if [ "$OUTPUT" != "$SOURCES" ]; then
+         OUTPUT_CFLAGS="-I$OUTPUT/include2 -I$OUTPUT/include"

patches/gcc-14.diff

@@ -0,0 +1,12 @@
+diff --git a/kernel-dkms/conftest.sh b/kernel-dkms/conftest.sh
+--- a/kernel-dkms/conftest.sh
++++ b/kernel-dkms/conftest.sh
+@@ -100,7 +100,7 @@ test_headers() {
+     BASE_CFLAGS="-O2 -D__KERNEL__ \
+ -DKBUILD_BASENAME=\"#conftest$$\" -DKBUILD_MODNAME=\"#conftest$$\" \
+ -nostdinc -isystem $ISYSTEM \
+--Wno-implicit-function-declaration -Wno-strict-prototypes"
++-Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-incompatible-pointer-types"
+
+     if [ "$OUTPUT" != "$SOURCES" ]; then
+         OUTPUT_CFLAGS="-I$OUTPUT/include2 -I$OUTPUT/include"