From accb2e46c9c68b82bee7294ac100d7c3a29585a4 Mon Sep 17 00:00:00 2001
From: psychon <psychon@726aef4b-f618-498e-8847-2d620e286838>
Date: Thu, 22 Jan 2009 11:19:42 +0000
Subject: [PATCH] Check if lstat() is available and use stat() instead if it
 isn't

git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1339 726aef4b-f618-498e-8847-2d620e286838
---
 FileUtils.cpp |  4 ++++
 configure     | 48 ++++++++++++++++--------------------------------
 configure.in  |  2 +-
 3 files changed, 21 insertions(+), 33 deletions(-)

diff --git a/FileUtils.cpp b/FileUtils.cpp
index d0498048..772a1883 100644
--- a/FileUtils.cpp
+++ b/FileUtils.cpp
@@ -12,6 +12,10 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
+#ifndef HAVE_LSTAT
+#  define lstat(a, b)	stat(a, b)
+#endif
+
 CFile::CFile() {
 	m_iFD = -1;
 	m_bClose = false;
diff --git a/configure b/configure
index b31dfcdb..34696a6b 100755
--- a/configure
+++ b/configure
@@ -2605,16 +2605,9 @@ _ACEOF
 
 fi
 
-
-
-
-
-for ac_func in stat lstat chmod open
-do
-as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-{ echo "$as_me:$LINENO: checking for $ac_func" >&5
-echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6; }
-if { as_var=$as_ac_var; eval "test \"\${$as_var+set}\" = set"; }; then
+{ echo "$as_me:$LINENO: checking for lstat" >&5
+echo $ECHO_N "checking for lstat... $ECHO_C" >&6; }
+if test "${ac_cv_func_lstat+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat >conftest.$ac_ext <<_ACEOF
@@ -2623,12 +2616,12 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
+/* Define lstat to an innocuous variant, in case <limits.h> declares lstat.
    For example, HP-UX 11i <limits.h> declares gettimeofday.  */
-#define $ac_func innocuous_$ac_func
+#define lstat innocuous_lstat
 
 /* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func (); below.
+    which can conflict with char lstat (); below.
     Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
     <limits.h> exists even on freestanding compilers.  */
 
@@ -2638,7 +2631,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 # include <assert.h>
 #endif
 
-#undef $ac_func
+#undef lstat
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
@@ -2646,18 +2639,18 @@ cat >>conftest.$ac_ext <<_ACEOF
 #ifdef __cplusplus
 extern "C"
 #endif
-char $ac_func ();
+char lstat ();
 /* The GNU C library defines this for functions which it implements
     to always fail with ENOSYS.  Some functions are actually named
     something starting with __ and the normal name is an alias.  */
-#if defined __stub_$ac_func || defined __stub___$ac_func
+#if defined __stub_lstat || defined __stub___lstat
 choke me
 #endif
 
 int
 main ()
 {
-return $ac_func ();
+return lstat ();
   ;
   return 0;
 }
@@ -2680,31 +2673,22 @@ eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
 	 test ! -s conftest.err
        } && test -s conftest$ac_exeext &&
        $as_test_x conftest$ac_exeext; then
-  eval "$as_ac_var=yes"
+  ac_cv_func_lstat=yes
 else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	eval "$as_ac_var=no"
+	ac_cv_func_lstat=no
 fi
 
 rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
       conftest$ac_exeext conftest.$ac_ext
 fi
-ac_res=`eval echo '${'$as_ac_var'}'`
-	       { echo "$as_me:$LINENO: result: $ac_res" >&5
-echo "${ECHO_T}$ac_res" >&6; }
-if test `eval echo '${'$as_ac_var'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-else
-  { { echo "$as_me:$LINENO: error: missing required libc feature" >&5
-echo "$as_me: error: missing required libc feature" >&2;}
-   { (exit 1); exit 1; }; }
+{ echo "$as_me:$LINENO: result: $ac_cv_func_lstat" >&5
+echo "${ECHO_T}$ac_cv_func_lstat" >&6; }
+if test $ac_cv_func_lstat = yes; then
+  appendCXX -DHAVE_LSTAT
 fi
-done
 
 
 if test -z "$NOSSL"; then
diff --git a/configure.in b/configure.in
index c8760d19..9b19b988 100644
--- a/configure.in
+++ b/configure.in
@@ -110,7 +110,7 @@ if test "x$GXX" = "xyes"; then
 fi
 
 AC_CHECK_LIB( gnugetopt, getopt_long,)
-AC_CHECK_FUNCS( stat lstat chmod open, , AC_MSG_ERROR([missing required libc feature]))
+AC_CHECK_FUNC([lstat], [appendCXX -DHAVE_LSTAT])
 
 if test -z "$NOSSL"; then
 	if test -n "$OPENSSL"; then