Cause configure --with-tcl to check for presence of <tcl.h>, as per

gripe from John Gray.  Also fix thinko in pltcl Makefile: if a special
Tcl include directory is specified, that ought to be searched first.

1 files changed, 115 insertions, 1 deletions

diff --git a/configure b/configure
index fda65e4a8b..5cca614b87 100755
--- a/configure
+++ b/configure
@@ -18494,7 +18494,121 @@ eval TCL_LIBS=\"$TCL_LIBS\"
 eval TCL_LIB_SPEC=\"$TCL_LIB_SPEC\"
 eval TCL_SHARED_BUILD=\"$TCL_SHARED_BUILD\"
 
-    fi
+        # now that we have TCL_INCLUDE_SPEC, we can check for <tcl.h>
+    ac_save_CPPFLAGS=$CPPFLAGS
+    CPPFLAGS="$TCL_INCLUDE_SPEC $CPPFLAGS"
+    if test "${ac_cv_header_tcl_h+set}" = set; then
+  echo "$as_me:$LINENO: checking for tcl.h" >&5
+echo $ECHO_N "checking for tcl.h... $ECHO_C" >&6
+if test "${ac_cv_header_tcl_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_tcl_h" >&5
+echo "${ECHO_T}$ac_cv_header_tcl_h" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking tcl.h usability" >&5
+echo $ECHO_N "checking tcl.h usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+$ac_includes_default
+#include <tcl.h>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_header_compiler=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking tcl.h presence" >&5
+echo $ECHO_N "checking tcl.h presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+#include <tcl.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  egrep -v '^ *\+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc in
+  yes:no )
+    { echo "$as_me:$LINENO: WARNING: tcl.h: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: tcl.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: tcl.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: tcl.h: proceeding with the preprocessor's result" >&2;};;
+  no:yes )
+    { echo "$as_me:$LINENO: WARNING: tcl.h: present but cannot be compiled" >&5
+echo "$as_me: WARNING: tcl.h: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: tcl.h: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: tcl.h: check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: tcl.h: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: tcl.h: proceeding with the preprocessor's result" >&2;};;
+esac
+echo "$as_me:$LINENO: checking for tcl.h" >&5
+echo $ECHO_N "checking for tcl.h... $ECHO_C" >&6
+if test "${ac_cv_header_tcl_h+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_header_tcl_h=$ac_header_preproc
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_tcl_h" >&5
+echo "${ECHO_T}$ac_cv_header_tcl_h" >&6
+
+fi
+if test $ac_cv_header_tcl_h = yes; then
+  :
+else
+  { { echo "$as_me:$LINENO: error: header file <tcl.h> is required for Tcl" >&5
+echo "$as_me: error: header file <tcl.h> is required for Tcl" >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+
+    CPPFLAGS=$ac_save_CPPFLAGS
+fi
 
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