diff options
Diffstat (limited to 'c++/configure.in')
| -rw-r--r-- | c++/configure.in | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/c++/configure.in b/c++/configure.in index 074b277..9b95b60 100644 --- a/c++/configure.in +++ b/c++/configure.in @@ -281,6 +281,54 @@ else fi AC_SUBST(LT_STATIC_EXEC) +case "$host_cpu-$host_vendor-$host_os" in + *linux*) + dnl ---------------------------------------------------------------------- + dnl Enable large file support on linux? Store the result in the LINUX_LFS + dnl variable for posterity + AC_ARG_ENABLE(linux-lfs, + [AC_HELP_STRING([--enable-linux-lfs], + [Enable support for large (64-bit) + files on Linux. [default=check]])]) + + case "X-$enable_linux_lfs" in + X-yes) + LINUX_LFS=yes + ;; + X-no) + LINUX_LFS=no + ;; + X-|*) + LINUX_LFS=no + AC_CHECK_FUNCS([getdents64], + dnl Add the large file support flags to the CXXFLAGS macro if + dnl we're on a Linux system which austensibly supports LFS. (We + dnl think it does if it has the `getdents64' syscall). + [LINUX_LFS=yes]) + ;; + esac + + AC_MSG_CHECKING([for large file support on linux mode]) + if test "X$LINUX_LFS" = "Xyes"; then + AC_MSG_RESULT([enabled]) + CXXFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE ${CXXFLAGS}" + else + AC_MSG_RESULT([disabled]) + fi + + dnl Add POSIX support on Linux systems, so <features.h> defines + dnl __USE_POSIX, which is required to get the prototype for fdopen + dnl defined correctly in <stdio.h> + CXXFLAGS="-D_POSIX_SOURCE ${CXXFLAGS}" + + dnl Also add BSD support on Linux systems, so <features.h> defines + dnl __USE_BSD, which is required to get the prototype for strdup + dnl defined correctly in <string.h> and snprintf & vsnprintf defined + dnl correctly in <stdio.h> + CXXFLAGS="-D_BSD_SOURCE ${CXXFLAGS}" + ;; +esac + dnl ---------------------------------------------------------------------- dnl Checks for compiler characteristics. dnl |