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#------------------------------------------------------------- -*- makefile -*-
# rules-ext.vc --
#
# Part of the nmake based build system for Tcl and its extensions.
# This file should only be included in makefiles for Tcl extensions,
# NOT in the makefile for Tcl itself.
# See TIP 477 (https://core.tcl.tk/tips/doc/trunk/tip/477.md) for docs.
!ifndef _RULES_EXT_VC
!if !exist("rules-ext.vc")
MSG = ^
You must run this makefile only from the directory it is in.^
Please `cd` to its location first.
!error $(MSG)
!endif
!if "$(PROJECT)" == "tcl"
!error The rules-ext.vc file is not intended for Tcl itself.
!endif
# First locate the Tcl directory that we are working with.
!ifdef TCLDIR
_RULESDIR = $(TCLDIR:/=\)
!else
# If an installation path is specified, that is also the Tcl directory.
# Also, tk never builds against an installed Tcl, it needs Tcl sources
!if defined(INSTALLDIR) && "$(PROJECT)" != "tk"
_RULESDIR=$(INSTALLDIR:/=\)
!else
_RULESDIR = ..\..\tcl
!endif
!endif # ifndef TCLDIR
# Now look for the rules.vc file under the Tcl root
!if exist("$(_RULESDIR)\lib\nmake\rules.vc") # Building against installed Tcl
_RULESDIR = $(_RULESDIR)\lib\nmake
!elseif exist("$(_RULESDIR)\win\rules.vc") # Building against Tcl sources
_RULESDIR = $(_RULESDIR)\win
!else
# If we have not located Tcl's rules file, most likely we are compiling
# against an older version of Tcl and so must use our own support files.
_RULESDIR = .
!endif
!if "$(_RULESDIR)" != "."
# Potentially using Tcl's support files. Need to compare the versions.
# We extract version numbers using the nmakehlp program. For this
# purpose, we use the version of nmakehlp that we have.
!if [$(CC) -nologo nmakehlp.c -link -subsystem:console > nul]
!endif
!if [echo TCL_RULES_MAJOR = \> versions.vc] \
&& [nmakehlp -V "$(_RULESDIR)\rules.vc" RULES_VERSION_MAJOR >> versions.vc]
!endif
!if [echo TCL_RULES_MINOR = \>> versions.vc] \
&& [nmakehlp -V "$(_RULESDIR)\rules.vc" RULES_VERSION_MINOR >> versions.vc]
!endif
!if [echo OUR_RULES_MAJOR = \>> versions.vc] \
&& [nmakehlp -V "rules.vc" RULES_VERSION_MAJOR >> versions.vc]
!endif
!if [echo OUR_RULES_MINOR = \>> versions.vc] \
&& [nmakehlp -V "rules.vc" RULES_VERSION_MINOR >> versions.vc]
!endif
!include versions.vc
# We have a newer version of the support files, use them
!if ($(TCL_RULES_MAJOR) != $(OUR_RULES_MAJOR)) || ($(TCL_RULES_MINOR) < $(OUR_RULES_MINOR))
_RULESDIR = .
!endif
!endif # $(_RULESDIR) != "."
# Let rules.vc know what copy of nmakehlp.c to use.
NMAKEHLPC = $(_RULESDIR)\nmakehlp.c
# Get rid of our internal defines before calling rules.vc
!undef TCL_RULES_MAJOR
!undef TCL_RULES_MINOR
!undef OUR_RULES_MAJOR
!undef OUR_RULES_MINOR
!message *** Using $(_RULESDIR)\rules.vc
!include "$(_RULESDIR)\rules.vc"
!endif # _RULES_EXT_VC
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