build: use <GL/glew.h> instead of <glew.h>.

build/autotools/m4/lol-gl.m4

@@ -100,12 +100,12 @@ PKG_CHECK_MODULES(GLEW, glew,
   GL_CFLAGS="${GLEW_CFLAGS} ${GL_CFLAGS}"
   GL_LIBS="${GLEW_LIBS} ${GL_LIBS}"],
  [:])
-AC_CHECK_HEADER(glew.h,
+AC_CHECK_HEADER(GL/glew.h,
  [LIBS_save="${LIBS}"
   LIBS="${LIBS} -lglew32s ${GL_LIBS}"
   AC_MSG_CHECKING(for glewInit in -lglew32s)
   AC_TRY_LINK(
-   [#include <glew.h>],
+   [#include <GL/glew.h>],
    [glewInit();],
    [ac_cv_my_have_glew="yes"
     GL_LIBS="-lglew32s ${GL_LIBS}"

build/msbuild/lol.vars.props

@@ -71,7 +71,7 @@
 
     <!-- OpenGL & GLEW -->
     <GlewDir>$(ExternalDir)\glew-1.9.0</GlewDir>
-    <GlIncludes>$(GlewDir)\include\GL</GlIncludes>
+    <GlIncludes>$(GlewDir)\include</GlIncludes>
     <GlLibs Condition="'$(Platform)'=='Win32'">$(GlewDir)\lib\i686-w64-mingw32</GlLibs>
     <GlLibs Condition="'$(Platform)'=='x64'">$(GlewDir)\lib\x86_64-w64-mingw32</GlLibs>
     <GlDeps Condition="'$(Platform)'=='Win32'">opengl32.lib;glew32s.lib</GlDeps>

src/lolgl.h

@@ -31,7 +31,7 @@
  * Do not include glew.h on OS X, because the version shipped with Fink
  * links with X11 whereas we want the system’s Cocoa-friendly GL libs. */
 #if defined USE_GLEW && !defined __APPLE__
-#   include <glew.h>
+#   include <GL/glew.h>
 #elif defined HAVE_GL_2X
 #   if defined __APPLE__ && defined __MACH__ && defined __arm__
 #       include <OpenGL/gl.h>