Small improvements.

gcc_stm32.cmake

@@ -86,7 +86,9 @@ FUNCTION(STM32_SET_FLASH_PARAMS TARGET STM32_FLASH_SIZE STM32_RAM_SIZE STM32_STA
         MESSAGE(FATAL_ERROR "No linker script specified. Please specify linker script using STM32_LINKER_SCRIPT variable.")
     ENDIF()
     CONFIGURE_FILE(${STM32_LINKER_SCRIPT} ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_flash.ld)
-    SET_TARGET_PROPERTIES(${TARGET} PROPERTIES LINK_FLAGS "-T${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_flash.ld ${CMAKE_EXE_LINKER_FLAGS}")
+    
+    GET_TARGET_PROPERTY(TARGET_LD_FLAGS ${TARGET} LINK_FLAGS)
+    SET_TARGET_PROPERTIES(${TARGET} PROPERTIES LINK_FLAGS "-T${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_flash.ld ${TARGET_LD_FLAGS}")
 ENDFUNCTION()
 
 FUNCTION(STM32_SET_FLASH_PARAMS TARGET FLASH_SIZE RAM_SIZE)
@@ -121,7 +123,9 @@ FUNCTION(STM32_SET_FLASH_PARAMS TARGET FLASH_SIZE RAM_SIZE)
     ENDIF()
         
     CONFIGURE_FILE(${STM32_LINKER_SCRIPT} ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_flash.ld)
-    SET_TARGET_PROPERTIES(${TARGET} PROPERTIES LINK_FLAGS "-T${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_flash.ld ${CMAKE_EXE_LINKER_FLAGS}")
+    
+    GET_TARGET_PROPERTY(TARGET_LD_FLAGS ${TARGET} LINK_FLAGS)
+    SET_TARGET_PROPERTIES(${TARGET} PROPERTIES LINK_FLAGS "-T${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_flash.ld ${TARGET_LD_FLAGS}")
 ENDFUNCTION()
 
 FUNCTION(STM32_SET_TARGET_PROPERTIES TARGET)

gcc_stm32f4.cmake

@@ -1,10 +1,10 @@
-SET(CMAKE_C_FLAGS "-mthumb -fno-builtin -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -Wall -std=gnu99 -ffunction-sections -fdata-sections -fomit-frame-pointer -mabi=aapcs -fno-unroll-loops -ffast-math -ftree-vectorize" CACHE INTERNAL "c compiler flags")
-SET(CMAKE_CXX_FLAGS "-mthumb -fno-builtin -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -Wall -std=c++11 -ffunction-sections -fdata-sections -fomit-frame-pointer -mabi=aapcs -fno-unroll-loops -ffast-math -ftree-vectorize" CACHE INTERNAL "cxx compiler flags")
-SET(CMAKE_ASM_FLAGS "-mthumb -mcpu=cortex-m4" CACHE INTERNAL "asm compiler flags")
+SET(CMAKE_C_FLAGS "-mthumb -fno-builtin -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -Wall -std=gnu99 -ffunction-sections -fdata-sections -fomit-frame-pointer -mabi=aapcs -fno-unroll-loops -ffast-math -ftree-vectorize" CACHE INTERNAL "c compiler flags")
+SET(CMAKE_CXX_FLAGS "-mthumb -fno-builtin -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -Wall -std=c++11 -ffunction-sections -fdata-sections -fomit-frame-pointer -mabi=aapcs -fno-unroll-loops -ffast-math -ftree-vectorize" CACHE INTERNAL "cxx compiler flags")
+SET(CMAKE_ASM_FLAGS "-mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp" CACHE INTERNAL "asm compiler flags")
 
-SET(CMAKE_EXE_LINKER_FLAGS "-nostartfiles -Wl,--gc-sections -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mabi=aapcs" CACHE INTERNAL "executable linker flags")
-SET(CMAKE_MODULE_LINKER_FLAGS "-mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mabi=aapcs" CACHE INTERNAL "module linker flags")
-SET(CMAKE_SHARED_LINKER_FLAGS "-mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mabi=aapcs" CACHE INTERNAL "shared linker flags")
+SET(CMAKE_EXE_LINKER_FLAGS "-nostartfiles -Wl,--gc-sections -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -mabi=aapcs" CACHE INTERNAL "executable linker flags")
+SET(CMAKE_MODULE_LINKER_FLAGS "-mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -mabi=aapcs" CACHE INTERNAL "module linker flags")
+SET(CMAKE_SHARED_LINKER_FLAGS "-mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -mabi=aapcs" CACHE INTERNAL "shared linker flags")
 
 SET(STM32_CHIP_TYPES 401xx 40_41xxx 427_437xx 429_439xx CACHE INTERNAL "stm32f4 chip types")
 SET(STM32_CODES "401.[BC]" "4[01][57].[EG]" "4[23]7.[EGI]" "4[23]9.[EGI]")