Matthias Kaehlcke writes: A compilation of an ARM toolchain with glibc 2.7 using crosstool-ng failed with a gcc error in glibc-2.7/posix/regex_internal.c, more concretly in the function build_wcs_upper_buffer(). The return type of the function prototype in regex_internal.h doesn't correspond with the return type of this function in regex_internal.c. The attached patch corrects the return type of the function prototype in regex_internal.h --- glibc-2.7/posix/regex_internal.h.org 2008-05-30 11:16:01.000000000 +0200 +++ glibc-2.7/posix/regex_internal.h 2008-05-30 11:16:35.000000000 +0200 @@ -391,7 +391,7 @@ internal_function; # ifdef RE_ENABLE_I18N static void build_wcs_buffer (re_string_t *pstr) internal_function; -static int build_wcs_upper_buffer (re_string_t *pstr) internal_function; +static reg_errcode_t build_wcs_upper_buffer (re_string_t *pstr) internal_function; # endif /* RE_ENABLE_I18N */ static void build_upper_buffer (re_string_t *pstr) internal_function; static void re_string_translate_buffer (re_string_t *pstr) internal_function;