永井@知能．九工大です．

ruby_1_8 branch のコンパイルに失敗します．
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$ make
gcc -g -O2   -I. -I.  -c io.c
io.c: In function `pipe_open':
io.c:2650: parse error before `int'
io.c:2653: `pr' undeclared (first use in this function)
io.c:2653: (Each undeclared identifier is reported only once
io.c:2653: for each function it appears in.)
io.c:2654: `pw' undeclared (first use in this function)
io.c:2657: `doexec' undeclared (first use in this function)
io.c:2665: `pid' undeclared (first use in this function)
io.c:2667: warning: unreachable code at beginning of switch statement
make: *** [io.o] エラー 1
$ gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.95.3/specs
gcc version 2.95.3 20010315 (release)
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こう↓でしょうか？

Index: io.c
===================================================================
RCS file: /var/cvs/src/ruby/io.c,v
retrieving revision 1.246.2.37
diff -u -r1.246.2.37 io.c
--- io.c	1 Nov 2004 23:53:48 -0000	1.246.2.37
+++ io.c	3 Nov 2004 02:39:08 -0000
@@ -2592,9 +2592,11 @@
     int modef = rb_io_mode_flags(mode);
     OpenFile *fptr;
 
-    if (!pname) pname = StringValuePtr(pstr);
 #if defined(DJGPP) || defined(__human68k__) || defined(__VMS)
-    FILE *f = popen(pname, mode);
+    FILE *f;
+
+    if (!pname) pname = StringValuePtr(pstr);
+    f = popen(pname, mode);
     
     if (!f) rb_sys_fail(pname);
     else {
@@ -2618,6 +2620,8 @@
     int pid;
     FILE *fpr, *fpw;
 
+    if (!pname) pname = StringValuePtr(pstr);
+
 retry:
     pid = pipe_exec(pname, rb_io_mode_modenum(mode), &fpr, &fpw);
     if (pid == -1) {		/* exec failed */
@@ -2649,6 +2653,8 @@
 #else
     int pid, pr[2], pw[2];
     volatile int doexec;
+
+    if (!pname) pname = StringValuePtr(pstr);
 
     if (((modef & FMODE_READABLE) && pipe(pr) == -1) ||
 	((modef & FMODE_WRITABLE) && pipe(pw) == -1))

-- 
                                         永井 秀利 （九工大 知能情報）
                                             nagai / ai.kyutech.ac.jp