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-rw-r--r--configure.ac16
-rw-r--r--src/util/system.cpp4
2 files changed, 18 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac
index ef87d759f1..c8984c83c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -851,6 +851,22 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <malloc.h>]],
[ AC_MSG_RESULT(no)]
)
+dnl Check for posix_fallocate
+AC_MSG_CHECKING(for posix_fallocate)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ // same as in src/util/system.cpp
+ #ifdef __linux__
+ #ifdef _POSIX_C_SOURCE
+ #undef _POSIX_C_SOURCE
+ #endif
+ #define _POSIX_C_SOURCE 200112L
+ #endif // __linux__
+ #include <fcntl.h>]],
+ [[ int f = posix_fallocate(0, 0, 0); ]])],
+ [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_POSIX_FALLOCATE, 1,[Define this symbol if you have posix_fallocate]) ],
+ [ AC_MSG_RESULT(no)]
+)
+
AC_MSG_CHECKING([for visibility attribute])
AC_LINK_IFELSE([AC_LANG_SOURCE([
int foo_def( void ) __attribute__((visibility("default")));
diff --git a/src/util/system.cpp b/src/util/system.cpp
index b0a538b527..b4df0680af 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -17,7 +17,7 @@
#endif
#ifndef WIN32
-// for posix_fallocate
+// for posix_fallocate, in configure.ac we check if it is present after this
#ifdef __linux__
#ifdef _POSIX_C_SOURCE
@@ -1012,7 +1012,7 @@ void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length) {
}
ftruncate(fileno(file), static_cast<off_t>(offset) + length);
#else
- #if defined(__linux__)
+ #if defined(HAVE_POSIX_FALLOCATE)
// Version using posix_fallocate
off_t nEndPos = (off_t)offset + length;
if (0 == posix_fallocate(fileno(file), 0, nEndPos)) return;