On 03/09/2022 08:07, Keith Packard via Gcc-patches wrote:
diff --git a/gcc/config/arm/elf.h b/gcc/config/arm/elf.h
index 3d111433ede..dc5b9374814 100644
--- a/gcc/config/arm/elf.h
+++ b/gcc/config/arm/elf.h
@@ -150,3 +150,8 @@
#undef L_floatundisf
#endif
+#if DEFAULT_LIBC == LIBC_PICOLIBC
+#undef LIB_SPEC
+#define LIB_SPEC "--start-group %(libgcc) -lc %{-oslib=*:-l%*} --end-group"
+#endif
+
Can't you add a gcc/config/picolibc.h (similar to gcc/config/rtems.h)
which is placed in gcc/config.gcc with something like this:
picolibc)
default_libc=LIBC_PICOLIBC
tm_file="${tm_file} picolibc.h"
;;
In this header place:
#undef LIB_SPEC
#define LIB_SPEC "--start-group %(libgcc) -lc %{-oslib=*:-l%*} --end-group"
#endif
This avoids having to modify all the ELF-specific files.
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