From f1688a162282541f0407a56f6c5d4e001d187c94 Mon Sep 17 00:00:00 2001
From: Adam Heath <doogie@debian.org>
Date: Fri, 20 Apr 2001 23:45:56 +0000
Subject: [PATCH] Add support for gcc attributes, printfformat, etc.  Be sure
 to run aclocal -I automake, and autoconf.

---
 ChangeLog        |  5 +++++
 automake/dpkg.m4 | 14 ++++++++++++++
 configure.in     | 20 ++++++++++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 59bd8a2a..f07c1259 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Apr 20 18:21:45 CDT 2001 Adam Heath <doogie@debian.org>
+
+  * automake/dpkg.m4, configure.in: Add support for gcc attributes,
+    printfformat, etc.
+
 Fri Apr 20 18:18:20 CDT 2001 Adam Heath <doogie@debian.org>
 
   * lib/database.c: initialize otherpriority with 0, not an int.
diff --git a/automake/dpkg.m4 b/automake/dpkg.m4
index f5146449..fc5eb128 100644
--- a/automake/dpkg.m4
+++ b/automake/dpkg.m4
@@ -42,3 +42,17 @@ AC_DEFUN(DPKG_C_GCC_TRY_WARNS,[
   AC_MSG_RESULT(no, not using GCC)
  fi
 ])
+dnl DPKG_CACHED_TRY_COMPILE(<description>,<cachevar>,<include>,<program>,<ifyes>,<ifno>)
+define(DPKG_CACHED_TRY_COMPILE,[
+ AC_MSG_CHECKING($1)
+ AC_CACHE_VAL($2,[
+  AC_TRY_COMPILE([$3],[$4],[$2=yes],[$2=no])
+ ])
+ if test "x$$2" = xyes; then
+  true
+  $5
+ else
+  true
+  $6
+ fi
+])
diff --git a/configure.in b/configure.in
index 7127c676..6649772f 100644
--- a/configure.in
+++ b/configure.in
@@ -157,6 +157,26 @@ AC_TRY_COMPILE([
 AC_TRY_COMPILE(,[
 } inline int foo (int x) {], AC_DEFINE(HAVE_INLINE))
 
+DPKG_CACHED_TRY_COMPILE(__attribute__((,,)),dpkg_cv_c_attribute_supported,,
+ [extern int testfunction(int x) __attribute__((,,))],
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_GNUC25_ATTRIB)
+  DPKG_CACHED_TRY_COMPILE(__attribute__((noreturn)),dpkg_cv_c_attribute_noreturn,,
+   [extern int testfunction(int x) __attribute__((noreturn))],
+   AC_MSG_RESULT(yes)
+   AC_DEFINE(HAVE_GNUC25_NORETURN),
+   AC_MSG_RESULT(no))
+  DPKG_CACHED_TRY_COMPILE(__attribute__((const)),dpkg_cv_c_attribute_const,,
+   [extern int testfunction(int x) __attribute__((const))],
+   AC_MSG_RESULT(yes)
+   AC_DEFINE(HAVE_GNUC25_CONST),
+   AC_MSG_RESULT(no))
+  DPKG_CACHED_TRY_COMPILE(__attribute__((format...)),dpkg_cv_attribute_format,,
+   [extern int testfunction(char *y, ...) __attribute__((format(printf,1,2)))],
+   AC_MSG_RESULT(yes)
+   AC_DEFINE(HAVE_GNUC25_PRINTFFORMAT),
+   AC_MSG_RESULT(no)),
+ AC_MSG_RESULT(no))
 
 DPKG_C_GCC_TRY_WARNS(-Wall -Wno-implicit, dpkg_cv_c_gcc_warn_all)
 DPKG_C_GCC_TRY_WARNS(-Wwrite-strings, dpkg_cv_c_gcc_warn_writestrings)
-- 
2.39.5