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diff --git a/contrib/one-true-awk/mac.code b/contrib/one-true-awk/mac.code
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+This file contains a make shell script and a version
+of the file missing95.c for the Mac, courtesy of
+Dan Allen.
+
+make shell script:
+
+# MPW Shell script to build Awk using Apple's MRC compiler.
+# 22 Jan 1999 - Created by Dan Allen.
+# 25 Mar 1999 - Updated for newer Awk.
+#
+# Porting notes for the Mac:
+# 
+# 1.  main in main.c needs to have its prototype changed to:
+# 
+#     int main(int argc, char *argv[], char *environ[])
+#
+# 2.  popen and pclose in missing95.c need to have as their body the
+#     older style
+#
+#				return NULL;
+#
+#     as parallel pipes are not supported by MPW.
+#
+# 3.  To make your Mac more responsive while long awk scripts run,
+#     you may want to add some SpinCursor calls to support cooperative multitasking.
+#
+# All of these minor changes can be put under "#ifdef powerc" for portability's sake.
+#
+#
+
+If {1} == "clean"
+	Delete -i awk maketab maketab.c.o ytab.c.o b.c.o main.c.o parse.c.o proctab.c proctab.c.o tran.c.o lib.c.o run.c.o lex.c.o missing95.c.o
+Else
+	MRC ytab.c -w off -opt speed
+	MRC b.c -w off -opt speed
+	MRC main.c -w off -opt speed
+	MRC parse.c -w off -opt speed
+	MRC maketab.c -w off -opt speed
+	PPCLink -o maketab maketab.c.o "{PPCLibraries}InterfaceLib" "{PPCLibraries}MathLib" "{PPCLibraries}StdCLib" "{PPCLibraries}StdCRuntime.o" "{PPCLibraries}PPCCRuntime.o" "{PPCLibraries}PPCToolLibs.o" -t MPST -c 'MPS '
+	maketab > proctab.c
+	MRC proctab.c -w off -opt speed
+	MRC tran.c -w off -opt speed
+	MRC lib.c -w off -opt speed
+	MRC run.c -w off -opt speed
+	MRC lex.c -w off -opt speed
+	MRC missing95.c -w off -opt speed
+	PPCLink -o awk ytab.c.o b.c.o main.c.o parse.c.o proctab.c.o tran.c.o lib.c.o run.c.o lex.c.o missing95.c.o "{PPCLibraries}InterfaceLib" "{PPCLibraries}MathLib" "{PPCLibraries}StdCLib" "{PPCLibraries}StdCRuntime.o" "{PPCLibraries}PPCCRuntime.o" "{PPCLibraries}PPCToolLibs.o" -d
+	SetFile awk -d . -m . -t MPST -c 'MPS '
+End
+
+
+missing95.c for the Mac:
+
+/* popen and pclose are not available on the Mac. */
+
+#include <stdio.h>
+
+FILE *popen(char *s, char *m) {
+	return NULL;
+}
+
+int pclose(FILE *f) {
+	return NULL;
+}
+