Detect and give error on second occurrence of #version.

Test/100.frag

 // okay
 #version 100
 int a[3] = { 2, 3, 4, };  // ERROR
-
+#version 100
 int uint;
 
 attribute vec4 v[3];     // ERROR

Test/420.vert

 #version 420 core
-
+#version 420 core
 varying vec2 v2;               // ERROR, varying reserved
 in vec4 bad[10];
 highp in vec4 badorder;

Test/baseResults/100.frag.out

@@ -2,6 +2,7 @@
 ERROR: 0:3: '{ } style initializers' : not supported with this profile: es
 ERROR: 0:3: 'initializer' : not supported for this version or the enabled extensions 
 ERROR: 0:3: 'array initializer' : not supported for this version or the enabled extensions 
+ERROR: 0:4: '#version' : must occur first in shader 
 ERROR: 0:7: 'attribute' : not supported in this stage: fragment
 ERROR: 0:7: 'float' : type requires declaration of default precision qualifier 
 ERROR: 0:9: '=' :  cannot convert from 'const int' to 'mediump float'
@@ -66,7 +67,7 @@ ERROR: 0:167: 'highp' : overloaded functions must have the same parameter precis
 ERROR: 0:170: 'multiple prototypes for same function' : not supported for this version or the enabled extensions 
 ERROR: 0:177: 'multiple prototypes for same function' : not supported for this version or the enabled extensions 
 ERROR: 0:179: '' :  syntax error
-ERROR: 60 compilation errors.  No code generated.
+ERROR: 61 compilation errors.  No code generated.
 
 
 ERROR: node is still EOpNull!

Test/baseResults/420.vert.out

 420.vert
 Warning, version 420 is not yet complete; some version-specific features are present, but many are missing.
+ERROR: 0:2: '#version' : must occur first in shader 
 WARNING: 0:3: varying deprecated in version 130; may be removed in future release
 ERROR: 0:3: 'varying' : no longer supported in core profile; removed in version 420
 ERROR: 0:7: '' : vertex input cannot be further qualified 
@@ -27,7 +28,7 @@ ERROR: 0:70: 'binding' : requires uniform or buffer storage qualifier
 ERROR: 0:71: 'binding' : binding is too large 
 ERROR: 0:74: 'binding' : sampler binding not less than gl_MaxCombinedTextureImageUnits 
 ERROR: 0:76: 'binding' : sampler binding not less than gl_MaxCombinedTextureImageUnits (using array)
-ERROR: 26 compilation errors.  No code generated.
+ERROR: 27 compilation errors.  No code generated.
 
 
 ERROR: node is still EOpNull!

glslang/Include/revision.h

@@ -9,5 +9,5 @@
 // source have to figure out how to create revision.h just to get a build
 // going.  However, if it is not updated, it can be a version behind.
 
-#define GLSLANG_REVISION "24342"
-#define GLSLANG_DATE     "2013/12/04 12:43:05"
+#define GLSLANG_REVISION "24343"
+#define GLSLANG_DATE     "2013/12/04 12:46:19"

glslang/MachineIndependent/preprocessor/Pp.cpp

@@ -694,8 +694,9 @@ int TPpContext::CPPversion(TPpToken* ppToken)
 {
     int token = currentInput->scan(this, currentInput, ppToken);
 
-    if (errorOnVersion)
+    if (errorOnVersion || versionSeen)
         parseContext.error(ppToken->loc, "must occur first in shader", "#version", "");
+    versionSeen = true;
 
     if (token == '\n') {
         parseContext.error(ppToken->loc, "must be followed by version number", "#version", "");

glslang/MachineIndependent/preprocessor/PpContext.cpp

@@ -155,6 +155,7 @@ void TPpContext::setInput(TInputScanner& input, bool versionWillBeError)
     in->prev = currentInput;
     currentInput = in;
     errorOnVersion = versionWillBeError;
+    versionSeen = false;
 }
 
 } // end namespace glslang

glslang/MachineIndependent/preprocessor/PpContext.h

@@ -208,6 +208,7 @@ protected:
 
     InputSrc *currentInput;
     bool errorOnVersion;
+    bool versionSeen;
 
     //
     // from Pp.cpp