From b9ad9bbfed92199a1a58504306d026cd2597539e Mon Sep 17 00:00:00 2001 From: Fabrice Fontaine Date: Wed, 30 Mar 2022 21:56:20 +0200 Subject: Fix build with uclibc-ng (#1145) uclibc-ng doesn't provide getauxval which results in the following build failure on arm or ppc with any user of abseil-cpp such as grpc: /home/buildroot/autobuild/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-uclibcgnueabi/10.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: /home/buildroot/autobuild/instance-0/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libabsl_random_internal_randen_hwaes.so.2111.0.0: undefined reference to `getauxval' To fix this build failure, check that __UCLIBC__ is not defined before using getauxval (as Babel is not able to check function availability) Fixes: - http://autobuild.buildroot.org/results/775f3ca3dedebff29e212b29dfa896b7613b7a02 Signed-off-by: Fabrice Fontaine --- absl/random/internal/randen_detect.cc | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'absl/random') diff --git a/absl/random/internal/randen_detect.cc b/absl/random/internal/randen_detect.cc index 9bb58fc6..6dababa3 100644 --- a/absl/random/internal/randen_detect.cc +++ b/absl/random/internal/randen_detect.cc @@ -24,6 +24,11 @@ #include "absl/random/internal/platform.h" +#if !defined(__UCLIBC__) && defined(__GLIBC__) && \ + (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 16)) +#define ABSL_HAVE_GETAUXVAL +#endif + #if defined(ABSL_ARCH_X86_64) #define ABSL_INTERNAL_USE_X86_CPUID #elif defined(ABSL_ARCH_PPC) || defined(ABSL_ARCH_ARM) || \ @@ -31,7 +36,7 @@ #if defined(__ANDROID__) #define ABSL_INTERNAL_USE_ANDROID_GETAUXVAL #define ABSL_INTERNAL_USE_GETAUXVAL -#elif defined(__linux__) +#elif defined(__linux__) && defined(ABSL_HAVE_GETAUXVAL) #define ABSL_INTERNAL_USE_LINUX_GETAUXVAL #define ABSL_INTERNAL_USE_GETAUXVAL #endif -- cgit v1.2.3