C言語は魅惑の言語でした。

CPUが16bitから32bitへの発展に貢献した言語。
UNIXが16bitから32bitへの発展に貢献した言語。

この２つの事象を経験していない人には、
C言語の意味も、役割も直感的には理解できないかもしれない。

そこでPortable C Compilerから始めようと思った。

$ docker run -it gcc /bin/bash

まずGCCを使う。

# cd /home
# mkdir cc
# cd cc
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/code.c
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/local.c
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/local2.c
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/order.c
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/table.c
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/order.c
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/makefile
# wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/INDEX
#  wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/macdefs
#  wget https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/pcc/mac2defs
# make
make: *** No targets specified and no makefile found.  Stop.

あれ？何があったし。

# ls
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Fcode.c'    'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Forder.c'
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Flocal.c'   
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Flocal2.c'  'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Ftable.c'
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Fmakefile'
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2FINDEX'
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Fmac2defs'
'utree.pl?file=V7%2Fusr%2Fsrc%2Fcmd%2Fpcc%2Fmacdefs'

# mv *code.c code.c
# mv *local.c local.c
# mv *local2.c local2.c
# mv *makefile makefile
# mv *order.c order.c
# mv *table.c table.c
# mv *INDEX INDEX
# mv *mac2defs mac2defs
# mv *macdefs macdefs
# make

><!DOCTYPE html
	PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body bgcolor="white">
<h1>V7/usr/src/cmd/pcc/makefile</h1>
<p>
<pre>
INSTALL=/usr/lib/ccom
M=/usr/src/cmd/mip
CFLAGS=-O
head:  ccom ;
all:	ccom
cp:	ccom
	cp ccom /usr/lib/ccom
	rm *.o cgram.c ccom
cmp:	ccom
	cmp ccom /usr/lib/ccom
	rm *.o cgram.c ccom
ccom: cgram.o xdefs.o scan.o pftn.o trees.o optim.o code.o local.o reader.o local2.o order.o match.o allo.o comm1.o table.o
	cc $(CFLAGS) -s -o ccom -i cgram.o xdefs.o scan.o pftn.o trees.o optim.o code.o local.o reader.o local2.o order.o match.o allo.o comm1.o table.o
trees.o: $M/manifest macdefs $M/mfile1 $M/trees.c
	cc -c $(CFLAGS) -I$M -I. $M/trees.c
optim.o: $M/manifest macdefs $M/mfile1 $M/optim.c
	cc -c $(CFLAGS) -I$M -I. $M/optim.c
pftn.o: $M/manifest macdefs $M/mfile1 $M/pftn.c
	cc -c $(CFLAGS) -I$M -I. $M/pftn.c
code.o: $M/manifest macdefs $M/mfile1
	cc -c $(CFLAGS) -I$M -I. code.c
local.o: $M/manifest macdefs $M/mfile1
	cc -c $(CFLAGS) -I$M -I. local.c
scan.o: $M/manifest macdefs $M/mfile1 $M/scan.c
	cc -c $(CFLAGS) -I$M -I. $M/scan.c
xdefs.o: $M/manifest $M/mfile1 macdefs $M/xdefs.c
	cc -c $(CFLAGS) -I$M -I. $M/xdefs.c
cgram.o: $M/manifest $M/mfile1 macdefs cgram.c
	cc -c $(CFLAGS) -I$M -I. cgram.c
cgram.c: $M/cgram.y
	yacc $M/cgram.y
	mv y.tab.c cgram.c
comm1.o: $M/manifest $M/mfile1 $M/common macdefs $M/comm1.c
	cc -c $(CFLAGS) -I. -I$M $M/comm1.c
table.o: $M/manifest $M/mfile2 mac2defs macdefs table.c
	cc -c $(CFLAGS) -I$M -I. table.c
reader.o: $M/manifest $M/mfile2 mac2defs macdefs $M/reader.c
	cc -c $(CFLAGS) -I$M -I. $M/reader.c
local2.o: $M/manifest $M/mfile2 mac2defs macdefs
	cc -c $(CFLAGS) -I$M -I. local2.c
order.o: $M/manifest $M/mfile2 mac2defs macdefs
	cc -c $(CFLAGS) -I$M -I. order.c
match.o: $M/manifest $M/mfile2 mac2defs macdefs $M/match.c
	cc -c $(CFLAGS) -I$M -I. $M/match.c
allo.o: $M/manifest $M/mfile2 mac2defs macdefs $M/allo.c
	cc -c $(CFLAGS) -I$M -I. $M/allo.c
shrink:
	rm *.o ccom
lintall:
	lint -hpv -I. -I$M  cgram.c xdefs.c $M/scan.c $M/pftn.c $M/trees.c $M/optim.c code.c local.c $M/reader.c local2.c order.c $M/match.c $M/allo.c $M/comm1.c table.c
fort: ccom fort.o freader.o fallo.o fmatch.o ftable.o forder.o flocal2.o fcomm2.o
	cc -i $(CFLAGS) fort.o freader.o fallo.o fmatch.o ftable.o forder.o flocal2.o fcomm2.o
	mv a.out fort
fort.o: fort.h $M/fort.c
	cc -c $(CFLAGS) -I$M -I. $M/fort.c
freader.o: reader.o
	cc -c $(CFLAGS) -I$M -I. $M/freader.c
fallo.o: allo.o
	cc -c $(CFLAGS) -I$M -I. $M/fallo.c
fmatch.o: match.o
	cc -c $(CFLAGS) -I$M -I. $M/fmatch.c
ftable.o: table.o
	cc -c $(CFLAGS) -I$M -I. $M/ftable.c
forder.o: order.o
	cc -c $(CFLAGS) -I$M -I. $M/forder.c
flocal2.o: local2.o
	cc -c $(CFLAGS) -I$M -I. $M/flocal2.c
fcomm2.o: $M/common
	cc -c $(CFLAGS) -I$M -I. $M/fcomm2.c
fort.o freader.o fallo.o fmatch.o ftable.o forder.o flocal2.o fcomm2.o: $M/mfile2 $M/manifest macdefs mac2defs
install:
	cp ccom $(INSTALL)
	cp macdefs mac2defs local.c code.c local2.c order.c table.c /usr/src/cmd/pcc
</pre>
</body>
</html>

最初の版は、機械依存の部分の移植が必要なのかも。
PDP-11用なのだろう。

（失敗編）

最後までおよみいただきありがとうございました。

いいね　💚、フォローをお願いします。

Thank you very much for reading to the last sentence.

Please press the like icon 💚　and follow me for your happy life.