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+$!------------------------------------------------------------------------------
+$! make "PNG: The Definitive Guide" demo programs (for X) under OpenVMS
+$!
+$! Script created by Martin Zinser for libpng; modified by Greg Roelofs
+$! for standalone pngbook source distribution.
+$!
+$!
+$! Set locations where zlib and libpng sources live.
+$!
+$ zpath = ""
+$ pngpath = ""
+$!
+$ if f$search("[---.zlib]zlib.h").nes."" then zpath = "[---.zlib]"
+$ if f$search("[--]png.h").nes."" then pngpath = "[--]"
+$!
+$ if f$search("[-.zlib]zlib.h").nes."" then zpath = "[-.zlib]"
+$ if f$search("[-.libpng]png.h").nes."" then pngpath = "[-.libpng]"
+$!
+$ if zpath .eqs. ""
+$ then
+$ write sys$output "zlib include not found. Exiting..."
+$ exit 2
+$ endif
+$!
+$ if pngpath .eqs. ""
+$ then
+$ write sys$output "libpng include not found. Exiting..."
+$ exit 2
+$ endif
+$!
+$! Look for the compiler used.
+$!
+$ ccopt="/include=(''zpath',''pngpath')"
+$ if f$getsyi("HW_MODEL").ge.1024
+$ then
+$ ccopt = "/prefix=all"+ccopt
+$ comp = "__decc__=1"
+$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
+$ else
+$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs.""
+$ then
+$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
+$ if f$search("SYS$SYSTEM:VAXC.EXE").eqs.""
+$ then
+$ comp = "__gcc__=1"
+$ CC :== GCC
+$ else
+$ comp = "__vaxc__=1"
+$ endif
+$ else
+$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include:
+$ ccopt = "/decc/prefix=all"+ccopt
+$ comp = "__decc__=1"
+$ endif
+$ endif
+$ open/write lopt lib.opt
+$ write lopt "''pngpath'libpng.olb/lib"
+$ write lopt "''zpath'libz.olb/lib"
+$ close lopt
+$ open/write xopt x11.opt
+$ write xopt "sys$library:decw$xlibshr.exe/share"
+$ close xopt
+$!
+$! Build 'em.
+$!
+$ write sys$output "Compiling PNG book programs ..."
+$ CALL MAKE readpng.OBJ "cc ''CCOPT' readpng" -
+ readpng.c readpng.h
+$ CALL MAKE readpng2.OBJ "cc ''CCOPT' readpng2" -
+ readpng2.c readpng2.h
+$ CALL MAKE writepng.OBJ "cc ''CCOPT' writepng" -
+ writepng.c writepng.h
+$ write sys$output "Building rpng-x..."
+$ CALL MAKE rpng-x.OBJ "cc ''CCOPT' rpng-x" -
+ rpng-x.c readpng.h
+$ call make rpng-x.exe -
+ "LINK rpng-x,readpng,lib.opt/opt,x11.opt/opt" -
+ rpng-x.obj readpng.obj
+$ write sys$output "Building rpng2-x..."
+$ CALL MAKE rpng2-x.OBJ "cc ''CCOPT' rpng2-x" -
+ rpng2-x.c readpng2.h
+$ call make rpng2-x.exe -
+ "LINK rpng2-x,readpng2,lib.opt/opt,x11.opt/opt" -
+ rpng2-x.obj readpng2.obj
+$ write sys$output "Building wpng..."
+$ CALL MAKE wpng.OBJ "cc ''CCOPT' wpng" -
+ wpng.c writepng.h
+$ call make wpng.exe -
+ "LINK wpng,writepng,lib.opt/opt" -
+ wpng.obj writepng.obj
+$ exit
+$!
+$!
+$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES
+$ V = 'F$Verify(0)
+$! P1 = What we are trying to make
+$! P2 = Command to make it
+$! P3 - P8 What it depends on
+$
+$ If F$Search(P1) .Eqs. "" Then Goto Makeit
+$ Time = F$CvTime(F$File(P1,"RDT"))
+$arg=3
+$Loop:
+$ Argument = P'arg
+$ If Argument .Eqs. "" Then Goto Exit
+$ El=0
+$Loop2:
+$ File = F$Element(El," ",Argument)
+$ If File .Eqs. " " Then Goto Endl
+$ AFile = ""
+$Loop3:
+$ OFile = AFile
+$ AFile = F$Search(File)
+$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl
+$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit
+$ Goto Loop3
+$NextEL:
+$ El = El + 1
+$ Goto Loop2
+$EndL:
+$ arg=arg+1
+$ If arg .Le. 8 Then Goto Loop
+$ Goto Exit
+$
+$Makeit:
+$ VV=F$VERIFY(0)
+$ write sys$output P2
+$ 'P2
+$ VV='F$Verify(VV)
+$Exit:
+$ If V Then Set Verify
+$ENDSUBROUTINE