Unfortunately this fails when doing a FLAVOR=full build with xg++: error:
unrecognized command line option '-fbracket-depth=512'. I will look into
this again, if only armv7 builds were a bit faster on my board...
On Fri, 23 Mar 2018, Markus Hennecke wrote:
> In order to compile gcc 4.9 on armv7 the patches below are required. I
> don't know if the approach for the configure patch is the correct way to
> inject -fbracket-depth=512 is the best way to do it. The patch for
> gcc/system.h had no effect on a i386 build. Perhaps this becomes handy if
> 6.3 packages are build for armv7.
>
> Index: patches/patch-gcc_configure
> ===================================================================
> RCS file: /cvs/ports/lang/gcc/4.9/patches/patch-gcc_configure,v
> retrieving revision 1.5
> diff -u -p -r1.5 patch-gcc_configure
> --- patches/patch-gcc_configure 1 Sep 2016 17:30:33 -0000 1.5
> +++ patches/patch-gcc_configure 23 Mar 2018 17:39:58 -0000
> @@ -1,7 +1,18 @@
> $OpenBSD: patch-gcc_configure,v 1.5 2016/09/01 17:30:33 pascal Exp $
> ---- gcc/configure.orig Sun May 22 10:53:32 2016
> -+++ gcc/configure Sat Aug 6 19:19:05 2016
> -@@ -17367,7 +17367,7 @@ openbsd*)
> +Index: gcc/configure
> +--- gcc/configure.orig
> ++++ gcc/configure
> +@@ -6597,6 +6597,9 @@ $as_echo "$ac_res" >&6; }
> + fi
> + done
> + CFLAGS="$save_CFLAGS"
> ++if [[ `uname -m` == armv7 ]] ; then
> ++ noexception_flags="$noexception_flags -fbracket-depth=512"
> ++fi
> +
> +
> + # Enable expensive internal checks
> +@@ -17367,7 +17370,7 @@ openbsd*)
> *) need_version=no ;;
> esac
> library_names_spec='${libname}${release}${shared_ext}$versuffix
> ${libname}${shared_ext}$versuffix'
> @@ -10,7 +21,7 @@ $OpenBSD: patch-gcc_configure,v 1.5 2016
> shlibpath_var=LD_LIBRARY_PATH
> if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test
> "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
> case $host_os in
> -@@ -21027,7 +21027,7 @@ openbsd*)
> +@@ -21027,7 +21030,7 @@ openbsd*)
> *) need_version=no ;;
> esac
> library_names_spec='${libname}${release}${shared_ext}$versuffix
> ${libname}${shared_ext}$versuffix'
> @@ -19,7 +30,7 @@ $OpenBSD: patch-gcc_configure,v 1.5 2016
> shlibpath_var=LD_LIBRARY_PATH
> if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test
> "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
> case $host_os in
> -@@ -27522,6 +27522,7 @@ else
> +@@ -27522,6 +27525,7 @@ else
> fi
>
> ;;
> Index: patches/patch-gcc_system_h
> ===================================================================
> RCS file: patches/patch-gcc_system_h
> diff -N patches/patch-gcc_system_h
> --- /dev/null 1 Jan 1970 00:00:00 -0000
> +++ patches/patch-gcc_system_h 23 Mar 2018 17:39:58 -0000
> @@ -0,0 +1,13 @@
> +$OpenBSD$
> +
> +Index: gcc/system.h
> +--- gcc/system.h.orig
> ++++ gcc/system.h
> +@@ -231,6 +231,7 @@ extern int errno;
> + file uses a standard library header that includes <cstdlib>, we will get
> + an error about 'using std::malloc'. */
> + #ifdef __cplusplus
> ++#include <new>
> + #include <cstdlib>
> + #endif
> +
>
>
