[runtime]

[mono.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index bcb065ac28818dafd2b6900159a2113da7a4bf59..abed4c36cdec1f12dcb0d453193bf2ac365b0863 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -529,12 +529,18 @@ AC_CACHE_CHECK([for clang],
 WARN=''
 if test x"$GCC" = xyes; then
         WARN='-Wall -Wunused -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes  -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wno-cast-qual -Wwrite-strings -Wno-switch -Wno-switch-enum -Wno-unused-value'
+
+               # We require C99 with some GNU extensions, e.g. `linux` macro
+               CFLAGS="$CFLAGS -std=gnu99"
+
                # The runtime code does not respect ANSI C strict aliasing rules
                CFLAGS="$CFLAGS -fno-strict-aliasing"
 
                # We rely on signed overflow to behave
                CFLAGS="$CFLAGS -fwrapv"
 
+               CFLAGS="$CFLAGS -DMONO_DLL_EXPORT"
+
                ORIG_CFLAGS=$CFLAGS
                CFLAGS="$CFLAGS -Wdeclaration-after-statement"
                AC_MSG_CHECKING(for -Wdeclaration-after-statement option to gcc)