dev-lang/ada-bootstrap: new package, add 0_p2021

Split dev-lang/gnat-gpl into dev-lang/ada-bootstrap. This ebuild
was initially a clone of dev-lang/gnat-gpl-2021-r5 then had some
cleanups done, toolchain.eclass use removed, and simplified what it
configures/builds/installs.

As I mentioned in 799693623d76c89e8b04d2434d0dfece44bb49f9, there were
two jobs left -- this fixes the first one: splitting dev-lang/gnat-gpl
into its own package which doesn't collide with sys-devel/gcc:10 and
also does the least possible work, not with lots of USE, etc.)

Some inspiration taken from sys-devel/bpf-toolchain. Considered
using the *-toolchain name again but given the purpose of this is *not*
just to avoid crossdev use but instead to bootstrap from a binary for Ada,
it didn't feel appropriate.

(Planned to do this anyway but the issue mentioned in
9732ef3475830dbe289fc80358613e90b612563c pushed me to get on with it now.)

Later versions of ada-bootstrap will be our own binaries for both
newer GCC as a base (although this is mostly a nice-to-have and to keep
things building rather than it being essential, AFAIK) as well as more
importantly musl and other arch support.

For that future work, see https://bugs.gentoo.org/940471#c1 for a
suggestion from Luke A. Guest. That will be tracked in bug #940472.

Bug: https://bugs.gentoo.org/547358
Bug: https://bugs.gentoo.org/919667
Bug: https://bugs.gentoo.org/940472
Closes: https://bugs.gentoo.org/940471
Signed-off-by: Sam James <sam@gentoo.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/dev-lang/ada-bootstrap/files/ada-bootstrap-0_p2021-gentoo.patch b/dev-lang/ada-bootstrap/files/ada-bootstrap-0_p2021-gentoo.patch
new file mode 100644
index 000000000000..c75ee9ce8da7
--- /dev/null
+++ b/dev-lang/ada-bootstrap/files/ada-bootstrap-0_p2021-gentoo.patch
@@ -0,0 +1,72 @@
+--- a/gcc-10-2021-20210519-19A74-src/gcc/ada/osint.adb	2017-03-10 21:58:02.600710156 +0100
++++ b/gcc-10-2021-20210519-19A74-src/gcc/ada/osint.adb	2017-03-10 21:59:38.033983293 +0100
+@@ -2229,14 +2229,11 @@
+       for J in Start_Of_Prefix .. Name_Len - Prog'Length + 1 loop
+          if Name_Buffer (J .. J + Prog'Length - 1) = Prog then
+             End_Of_Prefix := J - 1;
++            Start_Of_Suffix := J + Prog'Length;
+             exit;
+          end if;
+       end loop;
+ 
+-      if End_Of_Prefix > 1 then
+-         Start_Of_Suffix := End_Of_Prefix + Prog'Length + 1;
+-      end if;
+-
+       --  Create the new program name
+ 
+       return new String'
+--- a/gcc-10-2021-20210519-19A74-src/config/cet.m4	2022-01-01 11:18:09.663425422 +0100
++++ b/gcc-10-2021-20210519-19A74-src/config/cet.m4	2022-01-01 11:18:14.809345911 +0100
+@@ -62,7 +62,6 @@
+   i[[34567]]86-*-linux* | x86_64-*-linux*)
+     may_have_cet=yes
+     save_CFLAGS="$CFLAGS"
+-    CFLAGS="$CFLAGS -fcf-protection"
+     case "$enable_cet" in
+       auto)
+ 	# Check if target supports multi-byte NOPs
+--- a/gcc-10-2021-20210519-19A74-src/libiberty/configure	2024-03-02 19:45:34.658271627 +0100
++++ b/gcc-10-2021-20210519-19A74-src/libiberty/configure	2024-03-02 19:54:48.013538533 +0100
+@@ -6709,6 +6709,9 @@
+   if test "$cross_compiling" = yes; then :
+   ac_cv_c_stack_direction=0
+ else
++  cat >>confdefs.h <<_ACEOF
++extern void exit(int status);
++_ACEOF
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ find_stack_direction ()
+@@ -7539,6 +7542,11 @@
+   if test "$cross_compiling" = yes; then :
+   ac_cv_func_strncmp_works=yes
+ else
++  cat >>confdefs.h <<_ACEOF
++ extern long unsigned int strlen(const char *s);
++ extern char *strcpy(char *dst, const char *src);
++ extern int strncmp(const char *s1, const char *s2, long unsigned int n);
++_ACEOF
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+--- a/gcc-10-2021-20210519-19A74-src/libsanitizer/configure	2024-03-02 20:41:56.810707374 +0100
++++ b/gcc-10-2021-20210519-19A74-src/libsanitizer/configure	2024-03-02 20:43:00.189080219 +0100
+@@ -16073,6 +16073,7 @@
+     sanitizer_supported=no
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/syscall.h>
++#include <unistd.h>
+ int
+ main ()
+--- a/gcc-10-2021-20210519-19A74-src/libgfortran/configure	2024-03-02 21:57:47.282939696 +0100
++++ b/gcc-10-2021-20210519-19A74-src/libgfortran/configure	2024-03-02 21:58:34.702446345 +0100
+@@ -26391,6 +26391,7 @@
+ #if HAVE_IEEEFP_H
+ # include <ieeefp.h>
+ #endif /* HAVE_IEEEFP_H */
++extern void fpsetmask(int);
+ int
+ main ()
+ {