[osx build/linking]

- Remove the need for client apps to explicitly link with all dependent libs and frameworks
- Don't require redistributing libEGL/libGLES if not used, by linking them with '-weak-l' option
- Change examples build scripts accordingly

build.sh

@@ -63,8 +63,15 @@ if [ $target = 'lib' ] ; then
 	$CC $DEBUG_FLAGS -c -o $BINDIR/milepost_c.o $CFLAGS $FLAGS $INCLUDES $SRCDIR/milepost.c
 	$CC $DEBUG_FLAGS -c -o $BINDIR/milepost_objc.o $FLAGS $INCLUDES $SRCDIR/milepost.m
 
-	# build the static library
-	libtool -static -o $BINDIR/libmilepost.a $BINDIR/milepost_c.o $BINDIR/milepost_objc.o
+	# build dynamic library
+	ld -dylib -o $BINDIR/libmilepost.dylib $BINDIR/milepost_c.o $BINDIR/milepost_objc.o -lc -framework Carbon -framework Cocoa -framework Metal -framework QuartzCore -L$BINDIR -weak-lEGL -weak-lGLESv2
+
+	# change dependent libs path to @rpath.
+	install_name_tool -change "./libEGL.dylib" '@rpath/libEGL.dylib' $BINDIR/libmilepost.dylib
+	install_name_tool -change "./libGLESv2.dylib" '@rpath/libGLESv2.dylib' $BINDIR/libmilepost.dylib
+
+	# add executable path to rpath. Client executable can still add its own rpaths if needed, e.g. @executable_path/libs/ etc.
+	install_name_tool -add_rpath "@executable_path" $BINDIR/libmilepost.dylib
 
 else
 	# additional targets

examples/canvas/build.sh

@@ -5,12 +5,7 @@ RESDIR=../../resources
 SRCDIR=../../src
 
 INCLUDES="-I$SRCDIR -I$SRCDIR/util -I$SRCDIR/platform -I$SRCDIR/app"
-LIBS="-L$BINDIR -lmilepost -framework Carbon -framework Cocoa -framework Metal -framework QuartzCore -L$BINDIR -lEGL -lGLESv2"
-FLAGS="-mmacos-version-min=10.15.4 -DDEBUG -DLOG_COMPILE_DEBUG -Wl,-dead_strip"
+LIBS="-L$BINDIR -lmilepost"
+FLAGS="-mmacos-version-min=10.15.4 -DDEBUG -DLOG_COMPILE_DEBUG"
 
 clang -g $FLAGS $LIBS $INCLUDES -o $BINDIR/example_canvas main.c
-
-# change dynamic libraries install name
-#TODO: this shouldn't be needed for apps using only metal backend...
-install_name_tool -change "./libEGL.dylib" "@loader_path/libEGL.dylib" $BINDIR/example_canvas
-install_name_tool -change "./libGLESv2.dylib" "@loader_path/libGLESv2.dylib" $BINDIR/example_canvas

examples/perf_text/build.sh

@@ -5,7 +5,7 @@ RESDIR=../../resources
 SRCDIR=../../src
 
 INCLUDES="-I$SRCDIR -I$SRCDIR/util -I$SRCDIR/platform -I$SRCDIR/app -I$SRCDIR/graphics"
-LIBS="-L$BINDIR -lmilepost -framework Cocoa -framework Carbon -framework Metal -framework QuartzCore"
+LIBS="-L$BINDIR -lmilepost"
 FLAGS="-O2 -mmacos-version-min=10.15.4"
 
 clang -g $FLAGS $LIBS $INCLUDES -o $BINDIR/perf_text main.c

examples/triangleGLES/build.sh

@@ -3,13 +3,10 @@
 BINDIR=../../bin
 RESDIR=../../resources
 SRCDIR=../../src
+EXTDIR=../../ext
 
-INCLUDES="-I$SRCDIR -I$SRCDIR/util -I$SRCDIR/platform -I$SRCDIR/app -I$SRCDIR/../ext/angle_headers"
-LIBS="-L$BINDIR -lmilepost -framework Carbon -framework Cocoa -framework Metal -framework QuartzCore -lGLESv2 -lEGL"
+INCLUDES="-I$SRCDIR -I$SRCDIR/util -I$SRCDIR/platform -I$SRCDIR/app -I$EXTDIR"
+LIBS="-L$BINDIR -lmilepost"
 FLAGS="-mmacos-version-min=10.15.4 -DDEBUG -DLOG_COMPILE_DEBUG"
 
 clang -g $FLAGS $LIBS $INCLUDES -o $BINDIR/example_gles_triangle main.c
-
-# change dynamic libraries install name
-install_name_tool -change "./libEGL.dylib" "@loader_path/libEGL.dylib" $BINDIR/example_gles_triangle
-install_name_tool -change "./libGLESv2.dylib" "@loader_path/libGLESv2.dylib" $BINDIR/example_gles_triangle

examples/triangleGLES/main.c

@@ -12,8 +12,7 @@
 #define _USE_MATH_DEFINES //NOTE: necessary for MSVC
 #include<math.h>
 
-#include<GLES3/gl32.h>
-
+#define MG_INCLUDE_GL_API 1
 #include"milepost.h"
 
 #define LOG_SUBSYSTEM "Main"
@@ -70,6 +69,7 @@ int main()
 
 	//NOTE: create surface
 	mg_surface surface = mg_surface_create_for_window(window, MG_BACKEND_GLES);
+	mg_surface_prepare(surface);
 
 	//NOTE: init shader and gl state
 	GLuint vao;

examples/triangleMetal/build.sh

@@ -5,16 +5,11 @@ RESDIR=../../resources
 SRCDIR=../../src
 
 INCLUDES="-I$SRCDIR -I$SRCDIR/util -I$SRCDIR/platform -I$SRCDIR/app"
-LIBS="-L$BINDIR -lmilepost -framework Carbon -framework Cocoa -framework Metal -framework QuartzCore -L$BINDIR -lEGL -lGLESv2"
-FLAGS="-mmacos-version-min=10.15.4 -DDEBUG -DLOG_COMPILE_DEBUG -Wl,-dead_strip"
+LIBS="-L$BINDIR -lmilepost -framework Foundation -framework Metal"
+FLAGS="-mmacos-version-min=10.15.4 -DDEBUG -DLOG_COMPILE_DEBUG"
 
 xcrun -sdk macosx metal -c -o shader.air shader.metal
 xcrun -sdk macosx metallib -o shader.metallib shader.air
 cp shader.metallib $BINDIR/triangle_shader.metallib
 
 clang -g $FLAGS $LIBS $INCLUDES -o $BINDIR/example_metal_triangle main.m
-
-# change dynamic libraries install name
-#TODO: this shouldn't be needed for apps using only metal backend...
-install_name_tool -change "./libEGL.dylib" "@loader_path/libEGL.dylib" $BINDIR/example_metal_triangle
-install_name_tool -change "./libGLESv2.dylib" "@loader_path/libGLESv2.dylib" $BINDIR/example_metal_triangle

todo.txt

@@ -7,24 +7,20 @@ Overview
 	[/] error on bad option macro combinations
 	[/] write doc about backend option macros
 
-[?] could have an internal, per-platform mp_layer struct that handles resizing/hiding etc...
-	-> avoid duplication of frame/hiding and duplication of egl code.
-	[/] EGL surfaces: See how we can isolate platform-specific stuff and just deal with one egl impl...
-
 [ ] Check that we can make GLES and GL surfaces co-exist in the app
-[ ] Allow controlling surface overlaying
 
 [/] Allow selecting version of GL/GLES context when creating surface
 	- pass/set attributes when creating surface?
 [/] Automatic surface resizing
 
-[!] Make linking with libEGL optional, even if EGL backend is compiled in milepost?
-	- use dead_strip_dylib on osx?
+[.] Make linking with libEGL optional, even if EGL backend is compiled in milepost?
 	- use /DELAYLOAD:lib on windows?
+[.] Remove the need for client apps to link with all dependent libs explicitly
 
 [!] Bundle examples with their own resources?? (e.g. avoiding clashes in metal libs files in bin directory)
 
-[!] Sort out gles contents scaling for high dpi on osx
+[!] Allow controlling surface overlaying
+[!] Sort out contents scaling for high dpi on osx
 [!] win32 surfaces: only register surface child window once?
 [!] Fix canvas shader precision issue on OSX
 [!] Fix canvas perf issue on OSX