fix folly Range compilation on FreeBSD

Summary: - memrchr is GNU + Linux specific, it turns out

Test Plan: - compiled on FreeBSD, contbuild

Reviewed By: delong.j@fb.com

FB internal diff: D900935

diff --git a/folly/Range.h b/folly/Range.h
index 85a554c5919d9289555e7df437de2c80c869683a..a1cce77f4a995deea7e0dcfb1ceee93a7b8632ab 100644 (file)
--- a/folly/Range.h
+++ b/folly/Range.h
@@ -705,7 +705,7 @@ inline size_t qfind(const Range<const char*>& haystack, const char& needle) {
   return pos == nullptr ? std::string::npos : pos - haystack.data();
 }
 
-#ifdef _GNU_SOURCE // memrchr is a GNU extension
+#if FOLLY_HAVE_MEMRCHR
 template <>
 inline size_t rfind(const Range<const char*>& haystack, const char& needle) {
   auto pos = static_cast<const char*>(
@@ -723,7 +723,7 @@ inline size_t qfind(const Range<const unsigned char*>& haystack,
   return pos == nullptr ? std::string::npos : pos - haystack.data();
 }
 
-#ifdef _GNU_SOURCE // memrchr is a GNU extension
+#if FOLLY_HAVE_MEMRCHR
 template <>
 inline size_t rfind(const Range<const unsigned char*>& haystack,
                     const unsigned char& needle) {

diff --git a/folly/configure.ac b/folly/configure.ac
index 33ac2e8ecb933c5ad096bddf7a4a206ed221ae61..8d5765c13b40a44251c58b48dbe9c3c109475ad1 100644 (file)
--- a/folly/configure.ac
+++ b/folly/configure.ac
@@ -86,7 +86,8 @@ AC_CHECK_FUNCS([getdelim \
                 pthread_yield \
                 rallocm \
                 malloc_size \
-                malloc_usable_size])
+                malloc_usable_size \
+                memrchr])
 
 if test "$ac_cv_func_pthread_yield" = "no"; then
    AC_CHECK_HEADERS([sched.h])