diff --git a/Makefile.in b/Makefile.in
index 0e385ea58..8c2d66107 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -77,7 +77,7 @@ MAN = @MAN@
 PS2PDF = @PS2PDF@
 GIT = @GIT@
 
-CPPFLAGS = @ident_support@ @DEFS@ -I. -I$(srcdir) -DVERSION='"$(VERSION)"' @CPPFLAGS@
+CPPFLAGS = @DEFS@ -I. -I$(srcdir) -DVERSION='"$(VERSION)"' @CPPFLAGS@
 CXXFLAGS = -Wall @CXXFLAGS@
 PICFLAGS = @PICFLAG@
 LDFLAGS = @rdynamic@ @LDFLAGS@
diff --git a/aclocal.m4 b/aclocal.m4
index 0c140fc0a..5398aacda 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,28 +1,3 @@
-# AX_CPP_IDENT
-# ------------
-# Check if the C compiler supports #ident
-# Define and substitute ident_support if so.
-#
-# It would be simpler and more consistent with the rest of the autoconf
-# structure to AC_DEFINE(HAVE_CPP_IDENT) instead of
-# ident_support='-DHAVE_CVS_IDENT=1' and AC_SUBST(ident_support), but that
-# change would require all C files in the icarus top level directory to
-# put #include <config.h> before the #ifdef HAVE_CVS_IDENT (and change
-# HAVE_CVS_IDENT to HAVE_CPP_IDENT).   That would also remove all special
-# ident_support handling from the Makefile.  Manyana.
-#
-AC_DEFUN([AX_CPP_IDENT],
-[AC_CACHE_CHECK([for ident support in C compiler], ax_cv_cpp_ident,
-[AC_TRY_COMPILE([
-#ident "$Id: aclocal.m4,v 1.7 2007/05/16 23:59:12 steve Exp $"
-],[while (0) {}],
-[AS_VAR_SET(ax_cv_cpp_ident, yes)],
-[AS_VAR_SET(ax_cv_cpp_ident, no)])])
-if test $ax_cv_cpp_ident = yes; then
-  ident_support='-DHAVE_CVS_IDENT=1'
-fi
-AC_SUBST(ident_support)
-])# AC_CPP_IDENT
 
 # AX_ENABLE_SUFFIX
 # ----------------
diff --git a/cadpli/Makefile.in b/cadpli/Makefile.in
index 669961ff6..86f1cb4f2 100644
--- a/cadpli/Makefile.in
+++ b/cadpli/Makefile.in
@@ -39,7 +39,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I$(srcdir) -I$(srcdir)/.. -I.. @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I$(srcdir) -I$(srcdir)/.. -I.. @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/cadpli/configure.in b/cadpli/configure.in
index fa55d815a..12e1f2601 100644
--- a/cadpli/configure.in
+++ b/cadpli/configure.in
@@ -58,6 +58,4 @@ AX_C_UNDERSCORES_TRAILING
 ## end of test for underscores
 #######################
 
-AX_CPP_IDENT
-
 AC_OUTPUT(Makefile)
diff --git a/configure.in b/configure.in
index ab66fb7a8..ff001db97 100644
--- a/configure.in
+++ b/configure.in
@@ -121,8 +121,6 @@ AX_C_UNDERSCORES_TRAILING
 ## end of test for underscores
 #######################
 
-AX_CPP_IDENT
-
 # XXX disable tgt-fpga for the moment
 AC_CONFIG_SUBDIRS(vvp vpi tgt-stub tgt-null tgt-vvp tgt-vhdl libveriuser cadpli)
 
diff --git a/driver-vpi/Makefile.in b/driver-vpi/Makefile.in
index c484e4e32..46d937906 100644
--- a/driver-vpi/Makefile.in
+++ b/driver-vpi/Makefile.in
@@ -43,7 +43,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
+CPPFLAGS = -I. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/driver/Makefile.in b/driver/Makefile.in
index f624bd427..8e9c6ee03 100644
--- a/driver/Makefile.in
+++ b/driver/Makefile.in
@@ -43,7 +43,7 @@ INSTALL_DATA = @INSTALL_DATA@
 MAN = @MAN@
 PS2PDF = @PS2PDF@
 
-CPPFLAGS = @ident_support@ -I. -I.. -I$(srcdir)/.. -I$(srcdir) -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
+CPPFLAGS = -I. -I.. -I$(srcdir)/.. -I$(srcdir) -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/ivlpp/Makefile.in b/ivlpp/Makefile.in
index c4e0b1ccf..ef4fa0e7f 100644
--- a/ivlpp/Makefile.in
+++ b/ivlpp/Makefile.in
@@ -42,7 +42,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I. -I.. -I$(srcdir)/.. -I$(srcdir) -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
+CPPFLAGS = -I. -I.. -I$(srcdir)/.. -I$(srcdir) -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/libveriuser/Makefile.in b/libveriuser/Makefile.in
index 5c69e5485..7a4591c34 100644
--- a/libveriuser/Makefile.in
+++ b/libveriuser/Makefile.in
@@ -38,7 +38,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I. -I.. -I$(srcdir) -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I. -I.. -I$(srcdir) -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 RANLIB = @RANLIB@
diff --git a/libveriuser/configure.in b/libveriuser/configure.in
index d3a37b8d9..9d2241442 100644
--- a/libveriuser/configure.in
+++ b/libveriuser/configure.in
@@ -8,7 +8,6 @@ AC_PROG_INSTALL
 AC_PROG_RANLIB
 
 AC_EXEEXT
-AX_CPP_IDENT
 
 AX_ENABLE_SUFFIX
 
diff --git a/tgt-fpga/Makefile.in b/tgt-fpga/Makefile.in
index 0413f258b..ed9b0c96e 100644
--- a/tgt-fpga/Makefile.in
+++ b/tgt-fpga/Makefile.in
@@ -42,7 +42,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I.. -I$(srcdir) -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I.. -I$(srcdir) -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/tgt-fpga/configure.in b/tgt-fpga/configure.in
index 5481e1d8f..4abaa5a87 100644
--- a/tgt-fpga/configure.in
+++ b/tgt-fpga/configure.in
@@ -25,6 +25,4 @@ AX_C_PICFLAG
 # linker options when building a shared library
 AX_LD_SHAREDLIB_OPTS
 
-AX_CPP_IDENT
-
 AC_OUTPUT(Makefile)
diff --git a/tgt-pal/Makefile.in b/tgt-pal/Makefile.in
index c38bb5ee7..3c89e6bc3 100644
--- a/tgt-pal/Makefile.in
+++ b/tgt-pal/Makefile.in
@@ -38,7 +38,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I$(srcdir)/.. @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/tgt-stub/Makefile.in b/tgt-stub/Makefile.in
index b77bd6ec9..ecf50b22f 100644
--- a/tgt-stub/Makefile.in
+++ b/tgt-stub/Makefile.in
@@ -37,7 +37,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I.. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I.. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/tgt-stub/configure.in b/tgt-stub/configure.in
index 5f3b050bb..40f724eb9 100644
--- a/tgt-stub/configure.in
+++ b/tgt-stub/configure.in
@@ -23,6 +23,4 @@ AX_C_PICFLAG
 # linker options when building a shared library
 AX_LD_SHAREDLIB_OPTS
 
-AX_CPP_IDENT
-
 AC_OUTPUT(Makefile)
diff --git a/tgt-vhdl/Makefile.in b/tgt-vhdl/Makefile.in
index 20423541e..d7e32fc0e 100644
--- a/tgt-vhdl/Makefile.in
+++ b/tgt-vhdl/Makefile.in
@@ -38,7 +38,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@ @PICFLAG@
 CXXFLAGS = -Wall @CXXFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/tgt-vhdl/configure.in b/tgt-vhdl/configure.in
index 52ca76897..88219335a 100644
--- a/tgt-vhdl/configure.in
+++ b/tgt-vhdl/configure.in
@@ -27,6 +27,4 @@ AX_C_PICFLAG
 # linker options when building a shared library
 AX_LD_SHAREDLIB_OPTS
 
-AX_CPP_IDENT
-
 AC_OUTPUT(Makefile)
diff --git a/tgt-vvp/Makefile.in b/tgt-vvp/Makefile.in
index 4c1076523..476b4458d 100644
--- a/tgt-vvp/Makefile.in
+++ b/tgt-vvp/Makefile.in
@@ -40,7 +40,7 @@ INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_DATA = @INSTALL_DATA@
 
-CPPFLAGS = @ident_support@ -I. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I. -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/tgt-vvp/configure.in b/tgt-vvp/configure.in
index 9a245752a..91d0fd5d6 100644
--- a/tgt-vvp/configure.in
+++ b/tgt-vvp/configure.in
@@ -36,6 +36,4 @@ AX_C_PICFLAG
 # linker options when building a shared library
 AX_LD_SHAREDLIB_OPTS
 
-AX_CPP_IDENT
-
 AC_OUTPUT(Makefile)
diff --git a/vpi/Makefile.in b/vpi/Makefile.in
index 77c5b492b..6d45a5043 100644
--- a/vpi/Makefile.in
+++ b/vpi/Makefile.in
@@ -41,7 +41,7 @@ INSTALL_DATA = @INSTALL_DATA@
 LEX = @LEX@
 YACC = @YACC@
 
-CPPFLAGS = @ident_support@ -I. -I$(srcdir)/.. -I$(srcdir) -I.. @file64_support@ @CPPFLAGS@ @DEFS@ @PICFLAG@
+CPPFLAGS = -I. -I$(srcdir)/.. -I$(srcdir) -I.. @file64_support@ @CPPFLAGS@ @DEFS@ @PICFLAG@
 CFLAGS = -Wall @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
diff --git a/vpi/configure.in b/vpi/configure.in
index bf3d8f775..9b671d539 100644
--- a/vpi/configure.in
+++ b/vpi/configure.in
@@ -84,6 +84,4 @@ AX_LD_RDYNAMIC
 # linker options when building a shared library
 AX_LD_SHAREDLIB_OPTS
 
-AX_CPP_IDENT
-
 AC_OUTPUT(Makefile)
diff --git a/vvp/Makefile.in b/vvp/Makefile.in
index ad4f066ce..791d64484 100644
--- a/vvp/Makefile.in
+++ b/vvp/Makefile.in
@@ -50,7 +50,7 @@ YACC = @YACC@
 MAN = @MAN@
 PS2PDF = @PS2PDF@
 
-CPPFLAGS = @ident_support@ -I. -I.. -I $(srcdir) -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
+CPPFLAGS = -I. -I.. -I $(srcdir) -I$(srcdir)/.. -DVERSION='"$(VERSION)"' @CPPFLAGS@ @DEFS@
 CXXFLAGS = -Wall @CXXFLAGS@
 LDFLAGS = @rdynamic@ @LDFLAGS@
 LIBS = @LIBS@ @EXTRALIBS@
diff --git a/vvp/configure.in b/vvp/configure.in
index 3ffa8bc4c..7496dfb92 100644
--- a/vvp/configure.in
+++ b/vvp/configure.in
@@ -106,8 +106,6 @@ AX_LD_RDYNAMIC
 
 AX_LD_EXTRALIBS
 
-AX_CPP_IDENT
-
 # If not otherwise specified, set the libdir64 variable
 # to the same as libdir.
 AC_MSG_CHECKING(for libdir64 path)