This patch adjust config.gcc so that it installs <stdint.h> for NetBSD
5.x and 6.x, which is necessary for the C++ library because the host
<stdint.h> has:
#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS)
#include <machine/int_limits.h>
#endif
#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS)
#include <machine/int_const.h>
#endif
This means that contrary to the C++11 standard the stdint macros are
only defined when __STDC_CONSTANT_MACROS / __STDC_LIMIT_MACROS are
defined.
I first noted the problem earlier this year and opened
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65806
I rediscovered the problem when I broke netbsd bootstrap by including
<ext/random> during bootstrap with https://gcc.gnu.org/r227684
That header uses UINT32_C, which is not defined without this patch.
NetBSD 7.x should be OK, because it knows about C++11 (see the link in
the PR for details).
Tested x86_64-unknown-netbsd5.1, OK for trunk?
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index affc5ba..9450dcb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2015-09-16 Jonathan Wakely <jwak...@redhat.com>
+
+ * config.gcc (*-*-netbsd[5-6]*): Set use_gcc_stdint=wrap.
+
2015-09-15 Alan Lawrence <alan.lawre...@arm.com>
* config/aarch64/aarch64-simd.md
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 75807f5..394ded3 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -788,6 +788,14 @@ case ${target} in
default_use_cxa_atexit=yes
;;
esac
+
+ # NetBSD 5.x and 6.x provide <stdint.h> but require
+ # __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS for C++.
+ case ${target} in
+ *-*-netbsd[5-6]* | *-*-netbsdelf[5-6]*)
+ use_gcc_stdint=wrap
+ ;;
+ esac
;;
*-*-openbsd*)
tmake_file="t-openbsd"
