Building BusyBox (1.19.3) with Cygwin ?

[Denys Vlasenko]

On Saturday 04 February 2012 06:02, Tom Hartnett wrote:
> * I am new to BusyBox *
> 
> I apologize if this is not an appropriate avenue for this kind of 
> (hopefully) basic problem.
> 
> I recently got interested in BusyBox.  I tried using a pre-built (for 
> Windows32) executable.. and liked what I saw.  So I tried building 
> BusyBox from the source.
> 
> But first, here’s the “lay of the land.”
> 
> I’m running Windows 7 64-bit Professional.
> 
> My (very new) Cygwin environment is:
> - cygwin1.dll 1.7.9
> - gcc 3.4.4
> - binutils 2.22.51
> - make 3.82
> 
> So I tried “make defconfig,” and here’s what I get:
> 
> HOSTCC  scripts/basic/fixdep
> scripts/basic/fixdep.c: In function `parse_config_file':
> scripts/basic/fixdep.c:236: warning: array subscript has type `char'
> scripts/basic/fixdep.c:253: warning: array subscript has type `char'
> scripts/basic/fixdep.c:261: warning: array subscript has type `char'
> scripts/basic/fixdep.c: In function `parse_dep_file':
> scripts/basic/fixdep.c:337: warning: array subscript has type `char'
> /bin/sh: line 1:  5680 Segmentation fault      (core dumped) 
> scripts/basic/fixdep scripts/basic/.fixdep.d scripts/basic/fixdep 'gcc 
> -Wp,-MD,scripts/basic/.fixdep.d  -Wall -Wstrict-prototypes -O2 
> -fomit-frame-pointer       -o scripts/basic/fixdep 
> scripts/basic/fixdep.c   ' > scripts/basic/.fixdep.tmp
> scripts/Makefile.host:104: recipe for target `scripts/basic/fixdep' failed
> make[1]: *** [scripts/basic/fixdep] Error 139
> Makefile:356: recipe for target `scripts_basic' failed
> make: *** [scripts_basic] Error 2
> 
> Any thoughts/pointers appreciated.

Try this patch, and let me know whether it helps.

-- 
vda

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 165a8c3..6f06751 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -226,10 +226,10 @@ void use_config(char *m, int slen)
 void parse_config_file(char *map, size_t len)
 {
 	/* modified for bbox */
-	char *end_3 = map + len - 3; /* 3 == length of "IF_" */
-	char *end_7 = map + len - 7;
-	char *p = map;
-	char *q;
+	unsigned char *end_3 = (unsigned char *)map + len - 3; /* 3 == length of "IF_" */
+	unsigned char *end_7 = (unsigned char *)map + len - 7;
+	unsigned char *p = (unsigned char *)map;
+	unsigned char *q;
 	int off;
 
 	for (; p <= end_3; p++) {
@@ -263,7 +263,7 @@ void parse_config_file(char *map, size_t len)
 				break;
 		}
 		if (q != p) {
-			use_config(p, q-p);
+			use_config((char*)p, q - p);
 		}
 	}
 }
@@ -335,7 +335,7 @@ void parse_dep_file(void *map, size_t len)
 		p = m;
 		while (p < end && *p != ' ') p++;
 		if (p == end) {
-			do p--; while (!isalnum(*p));
+			do p--; while (!isalnum((unsigned char)*p));
 			p++;
 		}
 		memcpy(s, m, p-m); s[p-m] = 0;