diff --git a/configure.in.in b/configure.in.in
index 58e8ad45..57aba53e 100644
--- a/configure.in.in
+++ b/configure.in.in
@@ -116,11 +116,6 @@ AC_CHECK_PROG(GZIP_COMMAND, gzip, gzip)
 AC_DEFINE_UNQUOTED(MAKE_COMMAND, "$gmake_prog", [GNU make command])
 
 CXXFLAGS="$CXXFLAGS $KDE_DEFAULT_CXXFLAGS"
-case $host_os in
-hpux11*)
-    CPPFLAGS="$CPPFLAGS -D_PROTOTYPES"
-    ;;
-esac
 
 dnl AC_CHECK_FILE([$tqt_includes/qassistantclient.h], [],[AC_MSG_ERROR([The qassistantclient.h header from Qt3 is needed to build tdevelop, on some systems this header is in a separate package called qt3-apps-dev])])
 
diff --git a/kdevdesigner/designer/orderindicator.cpp b/kdevdesigner/designer/orderindicator.cpp
index 445e835f..7ee371bd 100644
--- a/kdevdesigner/designer/orderindicator.cpp
+++ b/kdevdesigner/designer/orderindicator.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h> // HP-UX compiler need this here
+#include <tqvariant.h>
 
 #include "orderindicator.h"
 #include "formwindow.h"
diff --git a/kdevdesigner/designer/pixmapchooser.cpp b/kdevdesigner/designer/pixmapchooser.cpp
index 79cb0cab..2d837a63 100644
--- a/kdevdesigner/designer/pixmapchooser.cpp
+++ b/kdevdesigner/designer/pixmapchooser.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h> // HP-UX compiler needs this here
+#include <tqvariant.h>
 
 #include <kiconloader.h>
 #include <kimageio.h>
diff --git a/kdevdesigner/designer/propertyeditor.cpp b/kdevdesigner/designer/propertyeditor.cpp
index 41d21a02..bfa136bb 100644
--- a/kdevdesigner/designer/propertyeditor.cpp
+++ b/kdevdesigner/designer/propertyeditor.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h> // HP-UX compiler needs this here
+#include <tqvariant.h>
 
 #include "propertyeditor.h"
 #include "formwindow.h"
diff --git a/kdevdesigner/designer/sizehandle.cpp b/kdevdesigner/designer/sizehandle.cpp
index a0e971bc..7e5c616a 100644
--- a/kdevdesigner/designer/sizehandle.cpp
+++ b/kdevdesigner/designer/sizehandle.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h>  // HP-UX compiler needs this here
+#include <tqvariant.h>
 
 #include "sizehandle.h"
 #include "formwindow.h"
diff --git a/kdevdesigner/designer/styledbutton.cpp b/kdevdesigner/designer/styledbutton.cpp
index 2976be3b..d047d69e 100644
--- a/kdevdesigner/designer/styledbutton.cpp
+++ b/kdevdesigner/designer/styledbutton.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h>  // HP-UX compiler needs this here
+#include <tqvariant.h>
 #include "styledbutton.h"
 #include "formwindow.h"
 #include "pixmapchooser.h"
diff --git a/kdevdesigner/designer/widgetfactory.cpp b/kdevdesigner/designer/widgetfactory.cpp
index 595cae71..f726778d 100644
--- a/kdevdesigner/designer/widgetfactory.cpp
+++ b/kdevdesigner/designer/widgetfactory.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h> // HP-UX compiler need this here
+#include <tqvariant.h>
 #include "widgetfactory.h"
 #include <widgetdatabase.h>
 #include "metadatabase.h"
diff --git a/kdevdesigner/designer/workspace.cpp b/kdevdesigner/designer/workspace.cpp
index df14b51e..31f7a2a0 100644
--- a/kdevdesigner/designer/workspace.cpp
+++ b/kdevdesigner/designer/workspace.cpp
@@ -24,7 +24,7 @@
 **
 **********************************************************************/
 
-#include <tqvariant.h>  // HP-UX compiler needs this here
+#include <tqvariant.h>
 #include "workspace.h"
 #include "formwindow.h"
 #include "mainwindow.h"
diff --git a/languages/cpp/app_templates/cppsdlhello/acinclude.m4 b/languages/cpp/app_templates/cppsdlhello/acinclude.m4
index 9681a33a..843cdd3b 100644
--- a/languages/cpp/app_templates/cppsdlhello/acinclude.m4
+++ b/languages/cpp/app_templates/cppsdlhello/acinclude.m4
@@ -89,7 +89,6 @@ int main (int argc, char *argv[])
   */
   { FILE *fp = fopen("conf.sdlmmtest", "a"); if ( fp ) fclose(fp); }
 
-  /* HP/UX 9 (%@#!) writes to sscanf strings */
   tmp_version = my_strdup("$min_sdlmm_version");
   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
      printf("%s, bad version string\n", "$min_sdlmm_version");
diff --git a/languages/cpp/debugger/stty.cpp b/languages/cpp/debugger/stty.cpp
index 2e39ce5f..e806b31b 100644
--- a/languages/cpp/debugger/stty.cpp
+++ b/languages/cpp/debugger/stty.cpp
@@ -49,11 +49,6 @@
 #include <unistd.h>
 #include <errno.h>
 
-#if defined (_HPUX_SOURCE)
-#define _TERMIOS_INCLUDED
-#include <bsdtty.h>
-#endif
-
 #include <tqintdict.h>
 #include <tqsocketnotifier.h>
 #include <tqstring.h>
diff --git a/languages/ruby/debugger/stty.cpp b/languages/ruby/debugger/stty.cpp
index 2e52096d..f2650666 100644
--- a/languages/ruby/debugger/stty.cpp
+++ b/languages/ruby/debugger/stty.cpp
@@ -48,11 +48,6 @@
 #include <time.h>
 #include <unistd.h>
 
-#if defined (_HPUX_SOURCE)
-#define _TERMIOS_INCLUDED
-#include <bsdtty.h>
-#endif
-
 #include <tqintdict.h>
 #include <tqsocketnotifier.h>
 #include <tqstring.h>
diff --git a/lib/antlr/README b/lib/antlr/README
index 1f6d902d..2fbb1645 100644
--- a/lib/antlr/README
+++ b/lib/antlr/README
@@ -36,7 +36,6 @@ egcs-1.1.2             Solaris 2.6,7              2.7.1a2
 egcs-1.1.2             Linux 2.2, Solaris 2.6     2.7.1a2
 gcc-2.95.2             Linux 2.2, Solaris 2.6,7   2.7.1a2
 gcc-2.96 (20000527)    Solaris 2.6                2.7.1a2
-aCC A.01.21            HP-UX 10.20                2.7.0 no!
 Visual C++ 6.0         PC                         2.7.1a2 (warnings)
 Intel C++ 4.0          NT 4.0                     2.7.0
 Borland 5.0            NT 4.0                     2.7.0
diff --git a/lib/antlr/antlr/CharScanner.h b/lib/antlr/antlr/CharScanner.h
index 4a0816a8..eacb2ec1 100644
--- a/lib/antlr/antlr/CharScanner.h
+++ b/lib/antlr/antlr/CharScanner.h
@@ -435,7 +435,7 @@ public:
 	/// Override this method to get more specific case handling
 	virtual int toLower(int c) const
 	{
-		// test on EOF_CHAR for buggy (?) STLPort tolower (or HPUX tolower?)
+		// test on EOF_CHAR for buggy STLPort tolower
 		// also VC++ 6.0 does this. (see fix 422 (is reverted by this fix)
 		// this one is more structural. Maybe make this configurable.
 		return (c == EOF_CHAR ? EOF_CHAR : tolower(c));
diff --git a/parts/appwizard/common/gnome/macros/gnome-fileutils.m4 b/parts/appwizard/common/gnome/macros/gnome-fileutils.m4
index 86eaca65..03025f2e 100644
--- a/parts/appwizard/common/gnome/macros/gnome-fileutils.m4
+++ b/parts/appwizard/common/gnome/macros/gnome-fileutils.m4
@@ -74,7 +74,7 @@ if test $ac_cv_func_getmntent = yes; then
 # Determine whether it's the one-argument variant or the two-argument one.
 
 if test -z "$list_mounted_fs"; then
-# 4.3BSD, SunOS, HP-UX, Dynix, Irix
+# 4.3BSD, SunOS, Dynix, Irix
 AC_MSG_CHECKING([for one-argument getmntent function])
 AC_CACHE_VAL(fu_cv_sys_mounted_getmntent1,
 [test $ac_cv_header_mntent_h = yes \
diff --git a/parts/appwizard/common/gnome/macros/gnome-print-check.m4 b/parts/appwizard/common/gnome/macros/gnome-print-check.m4
index 7d98281d..eb89ff56 100644
--- a/parts/appwizard/common/gnome/macros/gnome-print-check.m4
+++ b/parts/appwizard/common/gnome/macros/gnome-print-check.m4
@@ -87,7 +87,6 @@ int main ()
 
   system ("touch conf.gnome_printtest");
 
-  /* HP/UX 9 (%@#!) writes to sscanf strings */
   tmp_version = my_strdup("$min_gnome_print_version");
   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
      printf("%s, bad version string\n", "$min_gnome_print_version");
diff --git a/parts/appwizard/common/incadmin/config.guess b/parts/appwizard/common/incadmin/config.guess
index 201d615b..9680eded 100755
--- a/parts/appwizard/common/incadmin/config.guess
+++ b/parts/appwizard/common/incadmin/config.guess
@@ -510,92 +510,6 @@ EOF
     hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
 	echo m68k-hp-bsd4.4
 	exit ;;
-    9000/[34678]??:HP-UX:*:*)
-	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
-	case "${UNAME_MACHINE}" in
-	    9000/31? )            HP_ARCH=m68000 ;;
-	    9000/[34]?? )         HP_ARCH=m68k ;;
-	    9000/[678][0-9][0-9])
-		if [ -x /usr/bin/getconf ]; then
-		    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
-		    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
-		    case "${sc_cpu_version}" in
-		      523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0
-		      528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1
-		      532)                      # CPU_PA_RISC2_0
-			case "${sc_kernel_bits}" in
-			  32) HP_ARCH="hppa2.0n" ;;
-			  64) HP_ARCH="hppa2.0w" ;;
-			  '') HP_ARCH="hppa2.0" ;;   # HP-UX 10.20
-			esac ;;
-		    esac
-		fi
-		if [ "${HP_ARCH}" = "" ]; then
-		    eval $set_cc_for_build
-		    sed 's/^		//' << EOF >$dummy.c
-
-		#define _HPUX_SOURCE
-		#include <stdlib.h>
-		#include <unistd.h>
-
-		int main ()
-		{
-		#if defined(_SC_KERNEL_BITS)
-		    long bits = sysconf(_SC_KERNEL_BITS);
-		#endif
-		    long cpu  = sysconf (_SC_CPU_VERSION);
-
-		    switch (cpu)
-			{
-			case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
-			case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
-			case CPU_PA_RISC2_0:
-		#if defined(_SC_KERNEL_BITS)
-			    switch (bits)
-				{
-				case 64: puts ("hppa2.0w"); break;
-				case 32: puts ("hppa2.0n"); break;
-				default: puts ("hppa2.0"); break;
-				} break;
-		#else  /* !defined(_SC_KERNEL_BITS) */
-			    puts ("hppa2.0"); break;
-		#endif
-			default: puts ("hppa1.0"); break;
-			}
-		    exit (0);
-		}
-EOF
-		    (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
-		    test -z "$HP_ARCH" && HP_ARCH=hppa
-		fi ;;
-	esac
-	if [ ${HP_ARCH} = "hppa2.0w" ]
-	then
-	    eval $set_cc_for_build
-
-	    # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
-	    # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
-	    # generating 64-bit code.  GNU and HP use different nomenclature:
-	    #
-	    # $ CC_FOR_BUILD=cc ./config.guess
-	    # => hppa2.0w-hp-hpux11.23
-	    # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
-	    # => hppa64-hp-hpux11.23
-
-	    if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) |
-		grep -q __LP64__
-	    then
-		HP_ARCH="hppa2.0w"
-	    else
-		HP_ARCH="hppa64"
-	    fi
-	fi
-	echo ${HP_ARCH}-hp-hpux${HPUX_REV}
-	exit ;;
-    ia64:HP-UX:*:*)
-	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
-	echo ia64-hp-hpux${HPUX_REV}
-	exit ;;
     3050*:HI-UX:*:*)
 	eval $set_cc_for_build
 	sed 's/^	//' << EOF >$dummy.c
@@ -1254,7 +1168,7 @@ main ()
   printf ("arm-acorn-riscix\n"); exit (0);
 #endif
 
-#if defined (hp300) && !defined (hpux)
+#if defined (hp300)
   printf ("m68k-hp-bsd\n"); exit (0);
 #endif
 
diff --git a/parts/appwizard/common/incadmin/config.sub b/parts/appwizard/common/incadmin/config.sub
index a44fd184..16fa14ea 100755
--- a/parts/appwizard/common/incadmin/config.sub
+++ b/parts/appwizard/common/incadmin/config.sub
@@ -650,10 +650,6 @@ case $basic_machine in
 		basic_machine=m68k-hp
 		os=-bsd
 		;;
-	hp300hpux)
-		basic_machine=m68k-hp
-		os=-hpux
-		;;
 	hp3k9[0-9][0-9] | hp9[0-9][0-9])
 		basic_machine=hppa1.0-hp
 		;;
@@ -1303,7 +1299,7 @@ case $os in
 	# -sysv* is not here because it comes later, after sysvr4.
 	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
 	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
-	      | -hpux* | -unos* | -luna* | -auroraux* | -solaris* \
+	      | -unos* | -luna* | -auroraux* | -solaris* \
 	      | -sym* | -kopensolaris* \
 	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
 	      | -aos* | -aros* \
@@ -1558,9 +1554,6 @@ case $basic_machine in
 	*-oki)
 		os=-proelf
 		;;
-	*-hp)
-		os=-hpux
-		;;
 	*-hitachi)
 		os=-hiux
 		;;
@@ -1654,9 +1647,6 @@ case $basic_machine in
 			-beos*)
 				vendor=be
 				;;
-			-hpux*)
-				vendor=hp
-				;;
 			-mpeix*)
 				vendor=hp
 				;;
diff --git a/parts/appwizard/common/incadmin/depcomp b/parts/appwizard/common/incadmin/depcomp
index 9db17ebc..6155285c 100755
--- a/parts/appwizard/common/incadmin/depcomp
+++ b/parts/appwizard/common/incadmin/depcomp
@@ -104,7 +104,7 @@ gcc)
 ## Some versions of gcc put a space before the `:'.  On the theory
 ## that the space means something, we add a space to the output as
 ## well.
-## Some versions of the HPUX 10.20 sed can't process this invocation
+## Some old versions of sed can't process this invocation
 ## correctly.  Breaking it into two sed invocations is a workaround.
     sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
   rm -f "$tmpdepfile"
@@ -263,7 +263,7 @@ dashmstdout)
   cat < "$tmpdepfile" > "$depfile"
   tr ' ' '
 ' < "$tmpdepfile" | \
-## Some versions of the HPUX 10.20 sed can't process this invocation
+## Some old versions of sed can't process this invocation
 ## correctly.  Breaking it into two sed invocations is a workaround.
     sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
   rm -f "$tmpdepfile"
@@ -307,7 +307,7 @@ makedepend)
   cat < "$tmpdepfile" > "$depfile"
   tail +3 "$tmpdepfile" | tr ' ' '
 ' | \
-## Some versions of the HPUX 10.20 sed can't process this invocation
+## Some old versions of sed can't process this invocation
 ## correctly.  Breaking it into two sed invocations is a workaround.
     sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
   rm -f "$tmpdepfile" "$tmpdepfile".bak
diff --git a/parts/appwizard/common/incadmin/ltmain.sh b/parts/appwizard/common/incadmin/ltmain.sh
index 7de1caf8..fb4e75a4 100644
--- a/parts/appwizard/common/incadmin/ltmain.sh
+++ b/parts/appwizard/common/incadmin/ltmain.sh
@@ -2481,8 +2481,6 @@ static const void *lt_preloaded_setup() {
 	  # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1.
 	  *-*-freebsd2*|*-*-freebsd3.0*|*-*-freebsdelf3.0*)
 	    pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;;
-	  *-*-hpux*)
-	    pic_flag_for_symtable=" $pic_flag"  ;;
 	  *)
 	    if test "X$my_pic_p" != Xno; then
 	      pic_flag_for_symtable=" $pic_flag"
@@ -2729,10 +2727,6 @@ else
 fi
 DUALCASE=1; export DUALCASE # for MKS sh
 
-# The HP-UX ksh and POSIX shell print the target directory to stdout
-# if CDPATH is set.
-(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
-
 relink_command=\"$relink_command\"
 
 # This environment variable determines our operation mode.