diff options
| -rw-r--r-- | configure.ac | 3 | ||||
| -rw-r--r-- | src/Makefile.am | 1 | ||||
| -rw-r--r-- | src/compat/glibc_compat.cpp | 45 |
3 files changed, 49 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 1ffef1527b..72274f94e9 100644 --- a/configure.ac +++ b/configure.ac @@ -595,6 +595,8 @@ if test x$use_glibc_compat != xno; then [ fdelt_type="long int"]) AC_MSG_RESULT($fdelt_type) AC_DEFINE_UNQUOTED(FDELT_TYPE, $fdelt_type,[parameter and return value type for __fdelt_chk]) + AX_CHECK_LINK_FLAG([[-Wl,--wrap=__divmoddi4]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=__divmoddi4"]) + AX_CHECK_LINK_FLAG([[-Wl,--wrap=log2f]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=log2f"]) else AC_SEARCH_LIBS([clock_gettime],[rt]) fi @@ -1284,6 +1286,7 @@ AC_SUBST(DEBUG_CPPFLAGS) AC_SUBST(WARN_CXXFLAGS) AC_SUBST(NOWARN_CXXFLAGS) AC_SUBST(DEBUG_CXXFLAGS) +AC_SUBST(COMPAT_LDFLAGS) AC_SUBST(ERROR_CXXFLAGS) AC_SUBST(GPROF_CXXFLAGS) AC_SUBST(GPROF_LDFLAGS) diff --git a/src/Makefile.am b/src/Makefile.am index 9b2ae36f6a..9197c83b1c 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -380,6 +380,7 @@ libbitcoin_util_a_SOURCES = \ if GLIBC_BACK_COMPAT libbitcoin_util_a_SOURCES += compat/glibc_compat.cpp +AM_LDFLAGS += $(COMPAT_LDFLAGS) endif # cli: shared between bitcoin-cli and bitcoin-qt 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); +} |