Fix musl build musl does not define __GNUC_PREREQ. Use patch from Alpine Linux (http://git.alpinelinux.org/cgit/aports/plain/main/celt051/fix-gnuc-prereq.patch). Fixes http://autobuild.buildroot.net/results/223/223ba6003bdd7e0c896455c21fa8fee943b4e716/ Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks> --- celt-0.5.1.3.orig/libcelt/ecintrin.h +++ celt-0.5.1.3/libcelt/ecintrin.h @@ -52,8 +52,7 @@ /*Count leading zeros. This macro should only be used for implementing ec_ilog(), if it is defined. All other code should use EC_ILOG() instead.*/ -#ifdef __GNUC_PREREQ -#if __GNUC_PREREQ(3,4) +#if defined(__GNUC__) && ((__GNUC__<<16)+__GNUC_MINOR__) >= 0x304 # if INT_MAX>=2147483647 # define EC_CLZ0 sizeof(unsigned)*CHAR_BIT # define EC_CLZ(_x) (__builtin_clz(_x)) @@ -61,7 +60,6 @@ # define EC_CLZ0 sizeof(unsigned long)*CHAR_BIT # define EC_CLZ(_x) (__builtin_clzl(_x)) # endif -#endif #endif #if defined(EC_CLZ)