我正在为德州仪器的 Tiva C 系列 TMC123G Launchpad(ARM Cortex M4 MCU 板)编写一些代码,由于undefined reference to 'malloc'
. startup_gcc.c 和 project.ld 是TivaWare的一部分。等效文件可以在这里找到:
- /src/startup_gcc.c
- /TM4C123GH6PM.ld
这是我在构建时的控制台输出:
arm-none-eabi-gcc -o build/minimal.o src/minimal.c -g -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -Os -ffunction-sections -fdata-sections -MD -std=c99 -Wall -pedantic -DPART_TM4C123GH6PM -c -DTARGET_IS_BLIZZARD_RA1 -Dgcc -DF_CPU=80000000L -Isrc -Ilibraries -I/home/jakob/opt/tivaware
arm-none-eabi-gcc -o build/startup_gcc.o /home/jakob/opt/tivaware/examples/project/startup_gcc.c -g -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -Os -ffunction-sections -fdata-sections -MD -std=c99 -Wall -pedantic -DPART_TM4C123GH6PM -c -DTARGET_IS_BLIZZARD_RA1 -Dgcc - DF_CPU=80000000L -Isrc -Ilibraries -I/home/jakob/opt/tivaware
arm-none-eabi-ld -o build/a.out build/minimal.o build/startup_gcc.o -T /home/jakob/opt/tivaware/examples/project/project.ld --entry ResetISR --gc-sections
build/minimal.o: In function `Struct_begin':
/home/jakob/TivaMallocProblemMini/src/minimal.c:29: undefined reference to `malloc'
Makefile:66: recipe for target 'build/a.out' failed
make: *** [build/a.out] Error 1
这是问题的一个最小示例,函数(它被优化了。)malloc
中的main
似乎没有引起任何问题,只有Struct_begin
函数中的一个。
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
typedef struct s_Struct
{
int16_t param;
} Struct;
Struct* Struct_begin(int16_t param);
int main() {
Struct* s;
s = malloc(sizeof(Struct));
free(s);
s = Struct_begin(10);
s->param=0;
for(;;);
return EXIT_SUCCESS;
}
Struct* Struct_begin(int16_t param) {
Struct* s;
s = malloc(sizeof(Struct));
s->param = param;
return s;
}