Build Fontconfig 2.11 in-tree on Linux

After applying this patch, on Linux you will need to

    ../configure
    make clean-rust-azure clean-fontconfig clean-rust-fontconfig

Fixes #1752.

.gitmodules

@@ -61,6 +61,9 @@
 [submodule "src/platform/linux/rust-xlib"]
 	path = src/platform/linux/rust-xlib
 	url = https://github.com/mozilla-servo/rust-xlib.git
+[submodule "src/platform/linux/fontconfig"]
+	path = src/platform/linux/fontconfig
+	url = https://github.com/mozilla-servo/fontconfig.git
 [submodule "src/support/skia/skia"]
 	path = src/support/skia/skia
 	url = https://github.com/mozilla-servo/skia.git

README.md

@@ -25,8 +25,8 @@ On Debian-based Linuxes:
 
 ``` sh
 sudo apt-get install autoconf2.13 curl freeglut3-dev libtool \
-    libfreetype6-dev libfontconfig1-dev libgl1-mesa-dri libglib2.0-dev \
-    xorg-dev msttcorefonts
+    libfreetype6-dev libgl1-mesa-dri libglib2.0-dev xorg-dev \
+    msttcorefonts gperf
 ```
 
 On Debian-based Linuxes (cross-compilation for Android):

configure

@@ -524,6 +524,7 @@ if [ $CFG_OSTYPE = "unknown-linux-gnu" ]
 then
 CFG_SUBMODULES="\
     platform/linux/rust-xlib \
+    platform/linux/fontconfig \
     support/glfw/glfw \
     support/glfw/glfw-rs \
     platform/linux/rust-fontconfig \
@@ -621,7 +622,7 @@ then
     cd ${CFG_BUILD_DIR}
 fi
 
-#fontconfig expects to use an installed freetype, but we want to override that behavior to use our version
+# fontconfig expects to use an installed freetype, but we want to use our version on Android
 if [ $CFG_OSTYPE = "linux-androideabi" ]
 then
     export FREETYPE_CFLAGS="-I${CFG_SRC_DIR}src/platform/android/libfreetype2/include -I${CFG_BUILD_DIR}src/platform/android/libfreetype2/include"
@@ -681,6 +682,13 @@ do
             CONFIGURE_ARGS="${CONFIGURE_ARGS} --without-zlib"
             CONFIGURE_ARGS="${CONFIGURE_ARGS} ${EXTRA_CONFIGURE_ARGS}"
             ;;
+        platform/linux/fontconfig)
+            CONFIGURE_SCRIPT="${CFG_SRC_DIR}src/${i}/autogen.sh"
+            CONFIGURE_ARGS="${CONFIGURE_ARGS} --sysconfdir=/etc"
+            CONFIGURE_ARGS="${CONFIGURE_ARGS} --localstatedir=/var"
+            CONFIGURE_ARGS="${CONFIGURE_ARGS} --disable-shared" # work around Rust #12557
+            CONFIGURE_ARGS="${CONFIGURE_ARGS} ${EXTRA_CONFIGURE_ARGS}"
+            ;;
         platform/android/fontconfig)
             CONFIGURE_SCRIPT="${CFG_SRC_DIR}src/${i}/autogen.sh"
             CONFIGURE_ARGS="${CONFIGURE_ARGS} --host=arm-linux-androideabi"

mk/sub.mk

@@ -156,6 +156,7 @@ ifeq ($(CFG_OSTYPE),unknown-linux-gnu)
 DEPS_rust-azure += \
 	rust-freetype \
 	rust-fontconfig \
+	fontconfig \
 	rust-xlib \
 	rust \
 	$(NULL)
@@ -167,6 +168,15 @@ DEPS_rust-layers += \
 	rust-xlib \
 	rust \
 	$(NULL)
+
+DEPS_rust-fontconfig += \
+	fontconfig \
+	rust \
+	$(NULL)
+
+NATIVE_BUILD += \
+	fontconfig \
+	$(NULL)
 endif
 
 ifeq ($(CFG_OSTYPE),linux-androideabi)

src/platform/linux/fontconfig

@@ -0,0 +1 @@
+Subproject commit b2cfb1f4b3561e01a58359cd18929457a0486db7

src/platform/linux/rust-fontconfig

@@ -1 +1 @@
-Subproject commit f3d71aa708eb44736c4fe526fbf1bb55010c623b
+Subproject commit 34f83d9c614d5e1cc10bff4628450db3a4807902

src/support/azure/rust-azure

@@ -1 +1 @@
-Subproject commit e632b98a30eb84c333852e0bc0a68b1b6a7faf02
+Subproject commit 3dd39e85d326a4704367166c106643e8780a8a34