I was using arm gnu gcc toolchain 6.3.1 earlier and the following piece of code compiles without any errors.
__inline unsigned int add(unsigned int i, unsigned int j) { // some random sample code for example int ans = 0; for (int a = 0; a < j; a++) { ans = ans + 2; } for (int a = 0; a < i; a++) { ans = ans + 2; } for (int a = 0; a < j; a++) { ans = ans - 1; } for (int a = 0; a < i; a++) { ans = ans - 1; } return ans; } unsigned int add1(unsigned int i, unsigned int j) { return add(i, j); } unsigned int add2(unsigned int i, unsigned int j) { return add(i, j); } unsigned int add3(unsigned int i, unsigned int j) { return add(i, j); } unsigned int add4(unsigned int i, unsigned int j) { return add(i, j); }
When when I updated the toolchain to 10.2.1 I was getting the inline function as undefined
arm-none-eabi-ld: libapps.a(hello_main.o): in function `add1': hello/hello_main.c:84: undefined reference to `add' arm-none-eabi-ld: libapps.a(hello_main.o): in function `add2': hello/hello_main.c:89: undefined reference to `add' arm-none-eabi-ld: libapps.a(hello_main.o): in function `add3': hello/hello_main.c:94: undefined reference to `add' arm-none-eabi-ld: libapps.a(hello_main.o): in function `add4': hello/hello_main.c:99: undefined reference to `add'
As far as I understand, the compilers are backward compatible so I shouldn't be getting any errors for using a new toolchain version. Is there any way to fix the undefined inline functions error if possible without making any modifications to the existing code.