[PATCH] non-gcc-specific exception.sh

[Michael Shigorin <mike@altlinux.org>]

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	Hello,
please find attached the patch to (hopefully) improve
self-surgery script that uses gcc-specific -aux-info now.
Should help clang, icc and the like (in my case there's
no proper gcc port for the target platform just yet).

-- 
 ---- WBR, Michael Shigorin / http://altlinux.org
  ------ http://opennet.ru / http://anna-news.info

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From ccfa41adf46367e132ba7556fad53dfce9ddffaf Mon Sep 17 00:00:00 2001
From: Michael Shigorin <mike@altlinux.org>
Date: Mon, 7 Oct 2019 16:00:39 +0300
Subject: [PATCH] exception.sh: fixed to work with non-gcc

-aux-info is a gccism absent in clang, icc and the like;
let's reimplement this in a slightly cleaner way with -E.

Suggested-by: Evgeny Mareev
---
 libselinux/src/exception.sh  | 12 +++++-------
 libsemanage/src/exception.sh | 12 +++++-------
 2 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/libselinux/src/exception.sh b/libselinux/src/exception.sh
index d6c8c71..459295c 100755
--- a/libselinux/src/exception.sh
+++ b/libselinux/src/exception.sh
@@ -15,10 +15,8 @@ echo "
 ;;
 esac
 }
-if ! ${CC:-gcc} -x c -c -I../include - -aux-info temp.aux < ../include/selinux/selinux.h
-then
-    # clang does not support -aux-info so fall back to gcc
-    gcc -x c -c -I../include - -aux-info temp.aux < ../include/selinux/selinux.h
-fi
-for i in `awk '/<stdin>.*extern int/ { print $6 }' temp.aux`; do except $i ; done 
-rm -f -- temp.aux -.o
+
+# equivalent of gcc-specific -aux-info
+${CC:-gcc} -E -I../include -xc ../include/selinux/selinux.h |
+	sed -n 's/^extern * int *\(\w*\) *(.*$/\1/p' |
+	while read f; do except $f; done
diff --git a/libsemanage/src/exception.sh b/libsemanage/src/exception.sh
index 97bc2ae..11586a1 100644
--- a/libsemanage/src/exception.sh
+++ b/libsemanage/src/exception.sh
@@ -9,10 +9,8 @@ echo "
 }
 "
 }
-if ! ${CC:-gcc} -x c -c -I../include - -aux-info temp.aux < ../include/semanage/semanage.h
-then
-    # clang does not support -aux-info so fall back to gcc
-    gcc -x c -c -I../include - -aux-info temp.aux < ../include/semanage/semanage.h
-fi
-for i in `awk '/extern int/ { print $6 }' temp.aux`; do except $i ; done
-rm -f -- temp.aux -.o
+
+# equivalent of gcc-specific -aux-info
+${CC:-gcc} -E -I../include -xc ../include/semanage/semanage.h |
+	sed -n 's/^extern * int *\(\w*\) *(.*$/\1/p' |
+	while read f; do except $f; done
-- 
2.10.4