Look for system OpenSSL in the usual places; if not found recommend installing.

git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@188 423420c4-83ab-492f-b58f-81f9feb106b5

Makefile

@@ -8,8 +8,7 @@
 
 CC       = cc
 CFLAGS   = -O2 -DKEYMAP_PATH=\"$(KEYMAP_PATH)\"
-INCLUDES = -I$(X11DIR)/include
-LDFLAGS  = -L$(X11DIR)/lib -lX11 -lXext
+LDFLAGS  =
 
 prefix      = /usr/local
 exec_prefix = $(prefix)
@@ -86,5 +85,5 @@ dist:
 .SUFFIXES: .c .o
 
 .c.o:
-	$(CC) $(CFLAGS) $(INCLUDES) -o $@ -c $<
+	$(CC) $(CFLAGS) -o $@ -c $<
 

configure

@@ -8,44 +8,11 @@
 echo "# Generated by $0 $*" >Makeconf
 
 
-# Choose gcc if available
-
-if `which gcc >/dev/null`; then
-    echo "CC          = gcc" >>Makeconf
-fi
-
-
-# Find X installation
-
-xdirs="/usr/X11 /usr/X11R6 /usr/openwin /usr /usr/local/X11 /usr/local/X11R6 /usr/local"
-
-for dir in $xdirs; do
-    if [ -f $dir/include/X11/Xlib.h ]; then
-	xdir=$dir
-	break
-    fi
-done
-
-if [ -z $xdir ]; then
-    echo "ERROR: could not find X installation"
-    echo "(searched for include/X11/Xlib.h in $xdirs)"
-    exit 1
-fi
-
-echo "X11DIR      = $xdir" >> Makeconf
-
-
-# Add platform-specific options
-
-case `uname -s` in
-  SunOS)
-    echo "LDFLAGS    += -R$(X11DIR)/lib -lsocket -lnsl" >>Makeconf
-    ;;
-esac
-
-
 # Process command line options
 
+cflags=
+ldflags=
+
 for arg in $*; do
 optarg=`echo $arg | sed 's/[-a-z]*=//'`    
 case $arg in
@@ -65,17 +32,14 @@ case $arg in
     echo "datadir     = $optarg" >>Makeconf
     ;;
   --with-openssl*)
-    echo "CFLAGS     += -DWITH_OPENSSL" >>Makeconf
-    echo "LDFLAGS    += -lcrypto" >>Makeconf
-    echo "CRYPTOBJ    =" >>Makeconf
     ;;
   --without-openssl*)
     ;;
   --with-debug)
-    echo "CFLAGS     += -g -DWITH_DEBUG" >>Makeconf
+    cflags="$cflags -g -DWITH_DEBUG"
     ;;
   --with-debug-kbd)
-    echo "CFLAGS     += -g -DWITH_DEBUG_KBD" >>Makeconf
+    cflags="$cflags -g -DWITH_DEBUG_KBD"
     ;;
   --without-debug*)
     ;;
@@ -90,7 +54,6 @@ case $arg in
     echo " --sharedir=SHAREDIR    location for architecture-independent shared files [PREFIX/share/rdesktop]"
     echo
     echo "Build configuration:"
-    echo " --with-openssl         use system OpenSSL libraries for crypto"
     echo " --with-debug           enable protocol debugging output"
     echo " --with-debug-kbd       enable debugging of keyboard handling"
     echo
@@ -100,4 +63,87 @@ case $arg in
 esac
 done
 
+
+# Platform-specific options
+
+need_runpath=no
+
+case `uname -s` in
+  SunOS)
+    ldflags="$ldflags -lsocket -lnsl"
+    need_runpath=yes
+    ;;
+esac
+
+
+# Find X installation
+
+xdirs="/usr /usr/X11R6 /usr/X11 /usr/openwin /usr/local /usr/local/X11R6 /usr/local/X11"
+
+for dir in $xdirs; do
+    if [ -f $dir/include/X11/Xlib.h ]; then
+	xdir=$dir
+	break
+    fi
+done
+
+if [ -z "$xdir" ]; then
+    echo "ERROR: could not find X Window System headers"
+    echo "(searched for include/X11/Xlib.h in $xdirs)"
+
+    # additional helpful information for Linux users
+    if [ -f /etc/redhat_release ]; then
+      echo You probably need to install the XFree86-devel package
+    elif [ -f /etc/debian_version ]; then
+      echo You probably need to install the xlibs-dev package
+    fi
+    exit 1
+fi
+
+if [ $xdir != "/usr" ]; then
+    cflags="$cflags -I$xdir/include"
+    ldflags="$ldflags -L$xdir/lib"
+    if [ $need_runpath = "yes" ]; then
+	ldflags="$ldflags -R$xdir/lib"
+    fi
+fi
+
+ldflags="$ldflags -lX11"
+
+
+# Find OpenSSL installation if available
+
+ssldirs="/usr /usr/openssl /usr/ssl /usr/local /usr/local/openssl /usr/local/ssl"
+
+for dir in $ssldirs; do
+    if [ -f $dir/include/openssl/rc4.h ]; then
+	ssldir=$dir
+	break
+    fi
+done
+
+if [ -z "$ssldir" ]; then
+    echo "WARNING: could not find OpenSSL headers"
+    echo "(searched for include/openssl/rc4.h in $ssldirs)"
+    echo "Using in-tree crypto; installing OpenSSL is recommended."
+    echo
+else
+    echo "CRYPTOBJ    =" >>Makeconf
+
+    if [ $ssldir != "/usr" ]; then
+	cflags="$cflags -I$ssldir/include"
+	ldflags="$ldflags -L$ssldir/lib"
+	if [ $need_runpath = "yes" ]; then
+	    ldflags="$ldflags -R$ssldir/lib"
+	fi
+    fi
+
+    cflags="$cflags -DWITH_OPENSSL"
+    ldflags="$ldflags -lcrypto"
+fi
+
+
+echo "CFLAGS     += $cflags" >>Makeconf
+echo "LDFLAGS    += $ldflags" >>Makeconf
+
 echo "configure complete - now run make"