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From: "Alan Schmitt" <alan.schmitt@polytechnique.org>
To: caml-list@inria.fr
Date: Fri, 13 Jan 2012 21:48:49 +0100
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Subject: Re: [Caml-list] ocamlmklib OSX/OpenGL weirdness


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On 13 Jan 2012, at 20:41, Philippe Strauss wrote:

> I'm running 3.12.1 plus Jérémie Dimino gprint patch, and an up to 
> date godi setup.
> Trying to build Florent Monnier glMlite, I'm finding this singularity:
>
> ocamlopt.opt -verbose -g -c GL.ml
> 	+ as -arch x86_64 -o 'GL.o' 
> '/var/folders/Yj/YjSPq8kWEbucqe1B6qhw4E+++TI/-Tmp-/camlasm11ff8f.s'
>
> ocamlmklib -verbose  -o  GL  GL.cmx  -framework OpenGL -lgl_stubs
> 	+ /opt/godi312/bin/ocamlopt -a -o GL.cmxa  GL.cmx -cclib -lGL -ccopt 
> -L/opt/godi312/lib -ccopt -framework -ccopt OpenGL -cclib -lgl_stubs
>
> it seems (or I missed something) that ocamlmklib add -lGL when it 
> invokes ocamlopt, it should not on OSX, which requires "-framework 
> OpenGL".
>
> BTW, the two -ccopt -framework -ccopt OpenGL is a trickery for 
> whitespace containing linker arguments ?

Yes.

About the main question, I asked this a while back. This thread should 
explain what is going on.
https://sympa-roc.inria.fr/wws/arc/caml-list/2011-02/msg00144.html

This lead me to write a small patch to glMlite, which I attach. As this 
patch is OS X specific (the current build system is targeted for Linux), 
it has not been incorporated upstream. I have not have found the time to 
do a "universal" patch yet.

Hope this helps,

Alan


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diff --git a/SRC/Makefile b/SRC/Makefile
index 010f77661bfe37767259cb3f64e2262a678de457..cf06e20b7d97dfe2e1073adaf63=
509b393f87b22 100644
--- a/SRC/Makefile
+++ b/SRC/Makefile
@@ -184,8 +184,8 @@ dllgl_stubs.so libgl_stubs.a: gl.wrap.o
 	$(OCAMLMKLIB)  -oc  gl_stubs  $<  $(GL_LIBS)
 endif
=20
-GL.cmxa GL.a:  GL.cmx  dllgl_stubs.so
-	$(OCAMLMKLIB)  -o  GL  $<  $(GL_LIBS) -lgl_stubs
+GL.cmxa GL.a:  GL.cmx
+	$(OCAMLMKLIB)  -o  GL -oc gl_stubs  $^  $(GL_LIBS)
=20
 GL.cma:  GL.cmo  dllgl_stubs.so
 	$(OCAMLC) -a -o $@ -ccopt "$(GL_LIBS)" -dllib -lgl_stubs $<
@@ -229,8 +229,11 @@ glu.wrap.o: glu.wrap.c  $(C_GLU_INCS)
 dllGlu.so libGlu.a: glu.wrap.o
 	$(OCAMLMKLIB) -o Glu  $<  $(GLU_LIBS)
=20
-Glu.cmxa Glu.a:  Glu.cmx  dllGlu.so
-	$(OCAMLMKLIB) -o Glu  $<  $(GLU_LIBS)
+libglu_stubs.a: glu.wrap.o
+	$(OCAMLMKLIB) -oc  glu_stubs  $<  $(GLU_LIBS)
+
+Glu.cmxa Glu.a:  Glu.cmx  glu.wrap.o
+	$(OCAMLMKLIB) -o Glu -oc glu_stubs  $^  $(GLU_LIBS)
=20
 Glu.cma:  Glu.cmo  dllGlu.so
 	$(OCAMLMKLIB) -o Glu  $<  $(GLU_LIBS)
@@ -279,8 +282,8 @@ glut.wrap.o: glut.wrap.c  $(C_GLUT_INCS)
 dllGlut.so libGlut.a: glut.wrap.o
 	$(OCAMLMKLIB)  -o  Glut  $<  $(GLUT_LIBS)
=20
-Glut.cmxa Glut.a:  Glut.cmx  dllGlut.so
-	$(OCAMLMKLIB)  -o  Glut  $<  $(GLUT_LIBS)
+Glut.cmxa Glut.a:  Glut.cmx  glut.wrap.o
+	$(OCAMLMKLIB)  -o  Glut $^  $(GLUT_LIBS)
=20
 Glut.cma:  Glut.cmo  dllGlut.so
 	$(OCAMLMKLIB)  -o  Glut  $<  $(GLUT_LIBS)
@@ -484,7 +487,7 @@ DIST_FILES_CORE=3D\
     GL.a   GL.cmi   GL.cmxa   GL.cmx    \
     Glu.a  Glu.cmi  Glu.cmxa  Glu.cmx   \
     Glut.a Glut.cmi Glut.cmxa Glut.cmx  \
-    libgl_stubs.a     \
+    libgl_stubs.a  libglu_stubs.a   \
     libGlu.a          \
     libGlut.a         \
     GL.o    Glu.o    Glut.o     \

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