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* [gcc r13-1915] Update configure to check for a recent gnat Ada compiler.
@ 2022-08-01 10:41 Roger Sayle
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From: Roger Sayle @ 2022-08-01 10:41 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:71f068a9b3332a2179dfc807cf9138f691d77461
commit r13-1915-g71f068a9b3332a2179dfc807cf9138f691d77461
Author: Roger Sayle <roger@nextmovesoftware.com>
Date: Mon Aug 1 11:36:23 2022 +0100
Update configure to check for a recent gnat Ada compiler.
GCC fails to bootstrap when configured with --enable-languages=all on
machines that have older versions of GNAT installed as the system Ada
compiler. In configure, it's not sufficient to check whether gnat is
available, but whether a sufficiently recent version of GNAT is
installed. This patch tweaks config/acx.m4 so that conftest.adb also
contains a reference to System.CRTL.int64 as required by the current
version of gcc/ada/osint.adb. This fixes the build when the system
Ada is GNAT v4.8.5 (on Redhat 7) by disabling ada, but continues to
work fine when the system Ada is GNAT v11.3.1.
2022-08-01 Roger Sayle <roger@nextmovesoftware.com>
Arnaud Charlet <charlet@adacore.com>
config/ChangeLog
* acx.m4 (AC_PROG_GNAT): Update conftest.adb to include
features required of the host gnat compiler.
ChangeLog
* configure: Regenerate.
Diff:
---
config/acx.m4 | 6 +++++-
configure | 8 ++++++--
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/config/acx.m4 b/config/acx.m4
index b86c4f9e51d..7efe98aaf96 100644
--- a/config/acx.m4
+++ b/config/acx.m4
@@ -393,9 +393,13 @@ AC_DEFUN([ACX_PROG_GNAT],
AC_REQUIRE([AC_PROG_CC])
AC_CHECK_TOOL(GNATBIND, gnatbind, no)
AC_CHECK_TOOL(GNATMAKE, gnatmake, no)
-AC_CACHE_CHECK([whether compiler driver understands Ada],
+AC_CACHE_CHECK([whether compiler driver understands Ada and is recent enough],
acx_cv_cc_gcc_supports_ada,
[cat >conftest.adb <<EOF
+pragma Warnings (Off);
+with System.CRTL;
+pragma Warnings (On);
+use type System.CRTL.int64;
procedure conftest is begin null; end conftest;
EOF
acx_cv_cc_gcc_supports_ada=no
diff --git a/configure b/configure
index 65d7078dbe7..11539d7f01e 100755
--- a/configure
+++ b/configure
@@ -5602,12 +5602,16 @@ else
GNATMAKE="$ac_cv_prog_GNATMAKE"
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler driver understands Ada" >&5
-$as_echo_n "checking whether compiler driver understands Ada... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler driver understands Ada and is recent enough" >&5
+$as_echo_n "checking whether compiler driver understands Ada and is recent enough... " >&6; }
if ${acx_cv_cc_gcc_supports_ada+:} false; then :
$as_echo_n "(cached) " >&6
else
cat >conftest.adb <<EOF
+pragma Warnings (Off);
+with System.CRTL;
+pragma Warnings (On);
+use type System.CRTL.int64;
procedure conftest is begin null; end conftest;
EOF
acx_cv_cc_gcc_supports_ada=no
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