Linker error w/ 0.9.7

[ghost]

Edit - A further note, if it helps - I can still create a mat4 as a local variable, on the stack, inside a member function of my display class; the problem I've described only affects class member variables (as far as I know). And it's only matrices that have the trouble, not vec3's or vec4's. (And for what it's worth, the display class in question is a descendant of a WTL template window class. I have no idea if that's relevant or not.)

And this isn't corrected by cleaning the debris from builds against 0.9.6.n. A clean build fails when using 0.9.7, and works with 0.9.6.4 (and previous).

---

Using VS2010 Pro SP1, on Win7 x64, building a 32-bit app -

Using the following include/defines -

define GLM_MESSAGES

define GLM_FORCE_RADIANS

include glm/glm.hpp

include glm/gtc/matrix_transform.hpp

include glm/gtx/transform.hpp

using glm::mat4;
using glm::mat3;
using glm::vec3;
using glm::vec4;

The following compile-time messages are produced -

GLM: version 0.9.6.4
GLM: Windows platform detected
GLM: Visual C++ compiler detected
GLM: 32 bits model
GLM: C++0x
GLM: Language extensions enabled
GLM: Platform independent code
GLM: Swizzling operators disabled, #define GLM_SWIZZLE to enable swizzle operators
GLM: .length() returns glm::length_t, a typedef of int following the GLSL specification
GLM: Core library included
GLM: GLM_GTC_constants extension included
GLM: GLM_GTC_matrix_transform extension included
GLM: GLM_GTX_transform extension included

I declare a mat4 class member in a class header file:
mat4 m_ModelMatrix;

That class member variable is initialized in code in the associated .cpp file:
m_ModelMatrix = mat4(1.0f);

With GLM 0.9.6.4 (as the GLM version message above indicates), this compiles just fine (as it has w/ every version since I started using GLM).

With 0.9.7, I get the following linker error:

GLDisplay.obj : error LNK2019: unresolved external symbol "public: struct glm::tmat4x4<float,0> & __thiscall glm::tmat4x4<float,0>::operator=(struct glm::tmat4x4<float,0> const &)" (??4?$tmat4x4@M$0A@@glm@@QAEAAU01@ABU01@@z) referenced in function "private: void __thiscall CGLDisplay::GLInit(void)" (?GLInit@CGLDisplay@@AAEXXZ)
1>C:\some_directory\Debug\some_app.exe : fatal error LNK1120: 1 unresolved externals

The only difference in compile time messages is a different version number (0.9.7.0).

Any ideas or help would be appreciated.

[wierich]

VS 2012 is not able to interpret any of the

#if !GLM_HAS_DEFAULTED_FUNCTIONS ...

correctly.
One workaround for VS 2012 is to add

) == 0 ? 0 : 1

at the last line of the following code in the file detail/setup.hpp

#   define GLM_HAS_DEFAULTED_FUNCTIONS ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
        ((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC44)) || \
        ((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC2013)) || \
        ((GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL12)))) == 0 ? 0 : 1

Do not forget the bracket added in the first line of the code.

[ghost]

Thanks! That did the trick.

(So.... is this going to be flagged as a bug and fixed?)

But thanks again. Very helpful.

👍

Edit - Sorry - didn't mean to close this. Clicked the wrong button.

[wierich]

I agree with you, this should be marked as a bug.

[Groovounet]

Pretty major bug here. It happens also on Visual C++ 2010.

This is now fixed in master branch for GLM 0.9.7.1 release.

Thanks for reporting,
Christophe

[MicroSDA]

Its still not work. I use 0.9.7.3 and i have error LNK2019: unresolved external symbol "public: struct
glm::tmat4x4<float,0> in VS 2015, 2013 and 2010.