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Use Cmake macros to detect getauxval and dlopen

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This commit is contained in:
Guillaume Chatelet
2019-01-15 15:18:08 +01:00
parent e8e5610fc4
commit 122b067087
3 changed files with 19 additions and 21 deletions
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23
src/hwcaps.c
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@ -31,22 +31,18 @@
} while (0)
#endif
#if defined(CPU_FEATURES_ARCH_MIPS) || defined(CPU_FEATURES_ARCH_ANY_ARM)
#define HWCAPS_ANDROID_MIPS_OR_ARM
#endif
#if defined(CPU_FEATURES_OS_LINUX_OR_ANDROID) && \
!defined(HWCAPS_ANDROID_MIPS_OR_ARM)
#define HWCAPS_REGULAR_LINUX
#endif
////////////////////////////////////////////////////////////////////////////////
// Implementation of GetElfHwcapFromGetauxval
////////////////////////////////////////////////////////////////////////////////
#if defined(CPU_FEATURES_MOCK_GET_ELF_HWCAP_FROM_GETAUXVAL)
// Implementation will be provided by test/hwcaps_for_testing.cc.
#elif defined(HWCAPS_ANDROID_MIPS_OR_ARM)
#elif defined(HAVE_STRONG_GETAUXVAL)
#include <sys/auxv.h>
static unsigned long GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
return getauxval(hwcap_type);
}
#elif defined(HAVE_DLFCN_H)
// On Android we probe the system's C library for a 'getauxval' function and
// call it if it exits, or return 0 for failure. This function is available
// since API level 20.
@ -91,13 +87,6 @@ static uint32_t GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
dlclose(libc_handle);
return ret;
}
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
// On Regular Linux we simply use getauxval.
#include <dlfcn.h>
#include <sys/auxv.h>
static unsigned long GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
return getauxval(hwcap_type);
}
#else
#error "This platform does not provide hardware capabilities."
#endif