Hi!
I've made a little program with GLFW and GLEW in Code::Blocks, running perfectly. But if I compile it with cmake (without any errors or warnings), the window does show up but not display anything but the glClear() call (Changing the color with glClearColor() affects the window), but not my glDrawArrays, altough compiled under Code::Blocks it works...
I think it is cmake-related, because I have never used it, so here is my CMakeLists.txt:

Code: Select all

project(cells)

add_executable(cells cells_render.c cells.c main.c)

find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
include_directories(${GLFW_INCLUDE_DIRS})
target_link_libraries(cells ${GLFW_STATIC_LIBRARIES})

find_package(GLEW REQUIRED)
target_link_libraries(cells ${GLEW_LIBRARIES})


install(TARGETS cells RUNTIME DESTINATION bin)


and I am using FindGLEW.cmake to find GLEW:

Code: Select all

#
# Try to find GLEW library and include path.
# Once done this will define
#
# GLEW_FOUND
# GLEW_INCLUDE_PATH
# GLEW_LIBRARY
#

IF (WIN32)
FIND_PATH( GLEW_INCLUDE_PATH GL/glew.h
$ENV{PROGRAMFILES}/GLEW/include
${GLEW_ROOT_DIR}/include
DOC "The directory where GL/glew.h resides")

FIND_LIBRARY( GLEW_LIBRARY
NAMES glew GLEW glew32 glew32s
PATHS
$ENV{PROGRAMFILES}/GLEW/lib
${PROJECT_SOURCE_DIR}/src/nvgl/glew/bin
${PROJECT_SOURCE_DIR}/src/nvgl/glew/lib
DOC "The GLEW library")
ELSE (WIN32)
FIND_PATH( GLEW_INCLUDE_PATH GL/glew.h
/usr/include
/usr/local/include
/sw/include
/opt/local/include
${GLEW_ROOT_DIR}/include
DOC "The directory where GL/glew.h resides")

# Prefer the static library.
FIND_LIBRARY( GLEW_LIBRARY
NAMES libGLEW.a GLEW
PATHS
/usr/lib64
/usr/lib
/usr/local/lib64
/usr/local/lib
/sw/lib
/opt/local/lib
${GLEW_ROOT_DIR}/lib
DOC "The GLEW library")
ENDIF (WIN32)

SET(GLEW_FOUND "NO")
IF (GLEW_INCLUDE_PATH AND GLEW_LIBRARY)
SET(GLEW_LIBRARIES ${GLEW_LIBRARY})
SET(GLEW_FOUND "YES")
ENDIF (GLEW_INCLUDE_PATH AND GLEW_LIBRARY)


GLFW is compiled and installed from source, GLEW via apt-get.
I am using Linux Mint 17 KDE.
I hope I provided enough information and that you can help me...

Okay I figured it out, I think it was KDE-related:
In my vertex shader, I wrote:

...
gl_Position.xy = vertPos_in;
...

, ignoring the z and w values of gl_Position. On Linux Mint 16 Cinnamon with CodeBlocks it worked, but not anymore in Linux Mint 17 KDE with KDevelop. Sorry for my stupidness...

Probably more related to an updated graphics driver then, I'd guess