###############################################################################
#
###############################################################################

# platform check first then check for environmente.
if(WIN32)
    # visual studio
    if(MSVC)
        # C
        set(CMAKE_C_FLAGS_DEBUG          "/D_DEBUG /W3 /Wall /Tc /MTd /Zi /Ob0 /Od /RTC1")
        set(CMAKE_C_FLAGS_RELEASE        "/D NDEBUG /W3 /Wall /Tc /MT /O2 /Og /Ob2/GL")
        set(CMAKE_C_FLAGS_MINSIZEREL     "/D NDEBUG /W3 /Wall /Tc /MT /Ox /GL")
        set(CMAKE_C_FLAGS_RELWITHDEBINFO "/D NDEBUG /W3 /Wall /Tc /MT /ZI /O2 /Ob1 /GL")
        
        # C++ 
        set(CMAKE_CXX_FLAGS_DEBUG          "/D_DEBUG /W3 /Wall /Tp /MTd /Zi /Ob0 /Od /RTC1")
        set(CMAKE_CXX_FLAGS_RELEASE        "/D NDEBUG /W3 /Wall /Tp /MT /O2 /Og /Ob2 /GL")
        set(CMAKE_CXX_FLAGS_MINSIZEREL     "/D NDEBUG /W3 /Wall /Tp /MT /Ox /GL")
        set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/D NDEBUG /W3 /Wall /Tp /MT /ZI /O2 /Ob1 /GL")

    #MinGW
    elseif(MINGW)
        # C
        #set(CMAKE_C_FLAGS                "-g -ggdb -ansi -std=c99 -DDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_C_FLAGS_DEBUG          "-g -ggdb -ansi -std=c99 -DDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_C_FLAGS_RELEASE        "-O2 -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
        set(CMAKE_C_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
        set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
        
        # C++
        #set(CMAKE_CXX_FLAGS                "-g -DDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_DEBUG          "-g -DDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
    # cygwin environment
    elseif(CYGWIN)
        # C
        set(CMAKE_C_FLAGS                "-g -ggdb -ansi -std=c99 -DDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_C_FLAGS_DEBUG          "-g -ggdb -ansi -std=c99 -DDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_C_FLAGS_RELEASE        "-O2 -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
        set(CMAKE_C_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
        set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
        
        # C++ 
        set(CMAKE_CXX_FLAGS                "-g -DDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_DEBUG          "-g -DDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
        set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
    endif(MSVC)
elseif(APPLE)
    MESSAGE(FATAL " There are no flags set for apple")
elseif(UNIX)
    # C
    set(CMAKE_C_FLAGS                "-g -ggdb -ansi -std=c99 -DDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
    set(CMAKE_C_FLAGS_DEBUG          "-g -ggdb -ansi -std=c99 -DDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
    set(CMAKE_C_FLAGS_RELEASE        "-O2 -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
    set(CMAKE_C_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
    set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
    
    # C++ 
    set(CMAKE_CXX_FLAGS                "-g -DDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_DEBUG          "-g -DDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
else(WIN32)
    # C
    set(CMAKE_C_FLAGS_DEBUG          "-g -ggdb -ansi -std=c99 -DDEBUG -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
    set(CMAKE_C_FLAGS_RELEASE        "-O2 -ansi -std=c99 -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
    set(CMAKE_C_FLAGS_MINSIZEREL     "-O3 -Os -ansi -std=c99 -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fmessage-length=0")
    set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -ansi -std=c99 -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -DNDEBUG -W -Wextra -Wall -Wbad-function-cast -Wcomments -Wunused-macros -Wendif-labels -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement -fprofile-arcs -ftest-coverage -fmessage-length=0")
      
    # C++ 
    set(CMAKE_CXX_FLAGS_DEBUG          "-g -DDEBUG -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_MINSIZEREL     "-O3 -Os -DNDEBUG -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fmessage-length=0")
    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-g -O2 -DNDEBUG -mfpu=vfp -mthumb -mcpu=cortex-m3 -MD -nostartfiles -W -Wextra -Wall -Wshadow -Wunused-variable -Wunused-parameter -Wunused-function -Wunused -Wno-system-headers -Wno-deprecated -Woverloaded-virtual -Wwrite-strings -fprofile-arcs -ftest-coverage -fmessage-length=0")
endif(WIN32)