Package: pstotext
Version: 1.9-4
Severity: normal
When downloaded and built as is with recent gcc versions, pstotext does not
work because optimizations broke the code:
The following code
--- ptotdll.c --
[...]
static int ReadChar(char **instr) {
int c = **(unsigned char**)instr;
(*instr)++;
return c;
}
[...]
static int ReadInt(char **instr) {
int i = 0;
int sign = 1;
int c;
while ((c = ReadChar(instr))==' ') /* skip */ ;
[...]
----
is when compiled on amd64 with gcc (Debian 4.4.4-5) 4.4.4 and
make CC="gcc -g -Wall -DNEED_PROTO -O2"
results to
----
Dump of assembler code for function ReadInt:
0x0000000000401960 <ReadInt+0>: mov (%rdi),%rdx
0x0000000000401963 <ReadInt+3>: mov %rdx,%rax
0x0000000000401966 <ReadInt+6>: nopw %cs:0x0(%rax,%rax,1)
0x0000000000401970 <ReadInt+16>: movzbl (%rax),%ecx
0x0000000000401973 <ReadInt+19>: add $0x1,%rdx
0x0000000000401977 <ReadInt+23>: mov %rdx,(%rdi)
0x000000000040197a <ReadInt+26>: cmp $0x20,%ecx
0x000000000040197d <ReadInt+29>: je 0x401970 <ReadInt+16>
----
which seems to be bound to end in infinite loop unless leaving the cycle on
the first iteration.
The quick solution to this problem is to use -fno-strict-aliases for
compilation.
Jan Jeroným Zvánovec
-- System Information:
Debian Release: squeeze/sid
APT prefers stable
APT policy: (700, 'stable'), (650, 'testing'), (600, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-trunk-amd64 (SMP w/2 CPU cores)
Locale: LANG=cs_CZ.UTF-8, LC_CTYPE=cs_CZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages pstotext depends on:
ii ghostscript-x [gs- 8.62.dfsg.1-3.2lenny1 The GPL Ghostscript PostScript/PDF
ii gs-gpl 8.62.dfsg.1-3.2lenny1 Transitional package
ii libc6 2.11.1-3 Embedded GNU C Library: Shared lib
pstotext recommends no packages.
pstotext suggests no packages.
-- no debconf information
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