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authorChun Kuan Lee <ken2812221@gmail.com>2018-05-05 13:18:40 +0000
committerChun Kuan Lee <ken2812221@gmail.com>2018-06-02 19:18:41 +0000
commit908c1d7745f0ed117b0374fcc8486f83bf743bfc (patch)
tree8e697339a3fd215d1b666421f1ceafc3e760fe1f /src/compat/glibc_compat.cpp
parente24bf1ce184bc8d5bba70a3f3e9c43c2df07f4d3 (diff)
GCC-7 and glibc-2.27 compat code
Diffstat (limited to 'src/compat/glibc_compat.cpp')
-rw-r--r--src/compat/glibc_compat.cpp45
1 files changed, 45 insertions, 0 deletions
diff --git a/src/compat/glibc_compat.cpp b/src/compat/glibc_compat.cpp
index 55da5ef63f..b1cbe9f72a 100644
--- a/src/compat/glibc_compat.cpp
+++ b/src/compat/glibc_compat.cpp
@@ -7,6 +7,7 @@
#endif
#include <cstddef>
+#include <cstdint>
#if defined(HAVE_SYS_SELECT_H)
#include <sys/select.h>
@@ -27,3 +28,47 @@ extern "C" FDELT_TYPE __fdelt_warn(FDELT_TYPE a)
return a / __NFDBITS;
}
extern "C" FDELT_TYPE __fdelt_chk(FDELT_TYPE) __attribute__((weak, alias("__fdelt_warn")));
+
+#if defined(__i386__) || defined(__arm__)
+
+extern "C" int64_t __udivmoddi4(uint64_t u, uint64_t v, uint64_t* rp);
+
+extern "C" int64_t __wrap___divmoddi4(int64_t u, int64_t v, int64_t* rp)
+{
+ int32_t c1 = 0, c2 = 0;
+ int64_t uu = u, vv = v;
+ int64_t w;
+ int64_t r;
+
+ if (uu < 0) {
+ c1 = ~c1, c2 = ~c2, uu = -uu;
+ }
+ if (vv < 0) {
+ c1 = ~c1, vv = -vv;
+ }
+
+ w = __udivmoddi4(uu, vv, (uint64_t*)&r);
+ if (c1)
+ w = -w;
+ if (c2)
+ r = -r;
+
+ *rp = r;
+ return w;
+}
+#endif
+
+extern "C" float log2f_old(float x);
+#ifdef __i386__
+__asm(".symver log2f_old,log2f@GLIBC_2.1");
+#elif defined(__amd64__)
+__asm(".symver log2f_old,log2f@GLIBC_2.2.5");
+#elif defined(__arm__)
+__asm(".symver log2f_old,log2f@GLIBC_2.4");
+#elif defined(__aarch64__)
+__asm(".symver log2f_old,log2f@GLIBC_2.17");
+#endif
+extern "C" float __wrap_log2f(float x)
+{
+ return log2f_old(x);
+}