/usr/src/gcc-5/debian/patches/ada-driver-check.diff is in gcc-5-source 5.3.1-14ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # DP: Simplify Ada driver check (we always build using the required
# DP: Ada version. Needed for warnings on alpha.
Index: b/src/config/acx.m4
===================================================================
--- a/src/config/acx.m4
+++ b/src/config/acx.m4
@@ -381,7 +381,7 @@ acx_cv_cc_gcc_supports_ada=no
# Other compilers, like HP Tru64 UNIX cc, exit successfully when
# given a .adb file, but produce no object file. So we must check
# if an object file was really produced to guard against this.
-errors=`(${CC} $1[]m4_ifval([$1], [ ])-c conftest.adb) 2>&1 || echo failure`
+errors=`(${CC} $1[]m4_ifval([$1], [ ])-c conftest.adb) 2>/dev/null || echo failure`
if test x"$errors" = x && test -f conftest.$ac_objext; then
acx_cv_cc_gcc_supports_ada=yes
fi
Index: b/src/configure
===================================================================
--- a/src/configure
+++ b/src/configure
@@ -5311,7 +5311,7 @@ acx_cv_cc_gcc_supports_ada=no
# Other compilers, like HP Tru64 UNIX cc, exit successfully when
# given a .adb file, but produce no object file. So we must check
# if an object file was really produced to guard against this.
-errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
+errors=`(${CC} -c conftest.adb) 2>/dev/null || echo failure`
if test x"$errors" = x && test -f conftest.$ac_objext; then
acx_cv_cc_gcc_supports_ada=yes
fi
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