builder: mingw 32 bit updates.

Fix cross building glib with meson for 32 bit Windows, set cpu_family
correctly in the cross file.

Do not build ffmpeg for 32 bit Windows because it is not compatible with
Windows XP and it's better to have a smaller 32 bit binary.

Turn off LTO for 32 bit Windows because it is now broken too, in a
different way than for 64 bit Windows.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

tools/builder/core.sh

@@ -210,7 +210,6 @@ DISTS=$DISTS'
     ffmpeg          https://ffmpeg.org/releases/ffmpeg-4.2.1.tar.bz2                                            lib/libavformat.a
 '
 
-# for now we don't build ffmpeg because game recording is broken
 BUILD_FFMPEG=1
 
 FFMPEG_DISTS='
@@ -479,6 +478,9 @@ pre_build_all() {
 setup() {
     detect_os
 
+    target_os=${CROSS_OS:-$os}
+    target_bits=${target_bits:-$bits}
+
     mkdir -p "$BUILD_ROOT/tmp"
 
     rm -rf "$BUILD_ROOT/tmp/"*
@@ -506,6 +508,12 @@ setup() {
 
     cd "$OPWD"
 
+    # Don't use ffmpeg for 32 bit windows builds for XP compat and to make the
+    # binary smaller.
+    if [ "$target_os" = windows ] && [ "$target_bits" -eq 32 ]; then
+        BUILD_FFMPEG=
+    fi
+
     if [ -z "$BUILD_FFMPEG" ]; then
         for dist in $FFMPEG_DISTS; do
             table_line_remove DISTS $dist
@@ -2636,9 +2644,6 @@ die() {
 build_project() {
     puts "${NL}Building project: $CHECKOUT${NL}${NL}"
 
-    target_os=${CROSS_OS:-$os}
-    target_bits=${target_bits:-$bits}
-
     dist_pre_build project
 
     mkdir -p "$BUILD_ROOT/project"
@@ -2648,8 +2653,8 @@ build_project() {
 
     lto=ON
 
-    # FIXME: LTO still broken on 64 bit mingw
-    if [ "$target_os" = windows ] && [ "$target_bits" = 64 ]; then
+    # FIXME: LTO still broken on 64 bit mingw, and now 32 bit mingw too
+    if [ "$target_os" = windows ]; then
         lto=OFF
     fi
 

tools/builder/mingw-cross.sh

@@ -3,6 +3,7 @@
 set -e
 
 target_bits=64
+target_cpu_family=x86_64
 target_cpu=x86_64
 lib_suffix=64
 target_endian=little
@@ -13,6 +14,7 @@ case "$1" in
         ;;
     -32)
         target_bits=32
+        target_cpu_family=x86
         target_cpu=i686
         lib_suffix=
         shift
@@ -71,7 +73,7 @@ meson() {
         cat >$BUILD_ROOT/tmp/meson_cross_$$.txt <<EOF
 [host_machine]
 system     = 'windows'
-cpu_family = '$target_cpu'
+cpu_family = '$target_cpu_family'
 cpu        = '$target_cpu'
 endian     = '$target_endian'