Build fixes #11
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Build fixes #11
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gcc 10, if it recognizes some hand-written code that looks like
memcpy, will generate a call to memcpy().
For example:
while (dst < &_end_data) {
*dst++ = *src++;
}
gets recognized as such. However, in the context of bare-metal code,
having a call to memcpy() in the C library doesn't work. So we fix
that by disabling builtins.
Fixes:
/home/thomas/projets/buildroot/output/host/opt/ext-toolchain/bin/../arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: stm32f429i-disco.o: in function `reset':
stm32f429i-disco.c:(.text.reset+0x1a): undefined reference to `memcpy'
/home/thomas/projets/buildroot/output/host/opt/ext-toolchain/bin/../arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: stm32f429i-disco.c:(.text.reset+0x34): undefined reference to `memset'
make[1]: *** [Makefile:26: stm32f429i-disco] Error 1
Upstream: mcoquelin-stm32#9
Signed-off-by: Thomas Petazzoni <[email protected]>
In commit 0f3e61c ("Use ld instead of gcc for linking "), we started using ld instead of gcc for the link step. This worked fine for a while, but recent versions of ld no longer accept the -nostartfiles option, causing the build to break: Error: unable to disambiguate: -nostartfiles (did you mean --nostartfiles ?) In fact, -nostartfiles was passed to gcc prior to 0f3e61c, but it is not a ld option. It is only by luck that it was accepted and ignored by older ld versions. Since this option is useless when calling ld directly, we can simply drop it. Signed-off-by: Thomas Petazzoni <[email protected]>
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Build-tested with:
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