[mythtv] New configure script oddities

[Neale Swinnerton]

FYI - I had trouble compiling with the new configure script on my 
machine, I get:

gcc -c -mcpu=pentium4 -w -O2 -funroll-loops -fprefetch-loop-arrays -pipe 
-fno-pie -D_REENTRANT -DPIC -fPIC  -DMMX -DUSING_IVTV -DUSING_DVB 
-DUSING_XRANDR -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -DPREFIX=\"/usr\" 
-DHAVE_AV_CONFIG_H -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_THREAD_SUPPORT 
-I/usr/qt/3/mkspecs/linux-g++ -I. -I.. -I../.. -I/usr/qt/3/include -o 
postprocess.o libpostproc/postprocess.c
In file included from libpostproc/postprocess.c:645:
libpostproc/postprocess_template.c: In function `postProcess_MMX':
libpostproc/postprocess_template.c:3198: error: can't find a register in 
class `GENERAL_REGS' while reloading `asm'
libpostproc/postprocess_template.c:3283: error: can't find a register in 
class `GENERAL_REGS' while reloading `asm'
libpostproc/postprocess_template.c:3198: error: can't find a register in 
class `GENERAL_REGS' while reloading `asm'
libpostproc/postprocess_template.c:3283: error: can't find a register in 
class `GENERAL_REGS' while reloading `asm'


After a bit of Googling, It's some weird gcc error/bug that's cropped up 
on this list (and others) before. I "fixed" it by adding 
-fomit-frame-pointer to the CFLAGS, but that's not much help if you want 
to debug.

I had some trouble with the distcc support too, but that's probably some 
Gentoo'ism that I'm not inclined to investigate at the moment 
(--disable-distcc to configure got me going)

for the record:

$ gcc --version
gcc (GCC) 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3, pie-8.7.7.1)

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping        : 9
cpu MHz         : 2793.109
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca 
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips        : 5521.40


Neale

Anduin Withers wrote:
> If one is foolish enough to pass --cpu=i686 in to the configure script it
> isn't really honored. The problem is that through normal auto-detection $cpu
> would be set to x86, in the case where it is overridden this transformation
> doesn't occur (that chunk of script is before the option processing chunk)
> this leads to unpleasant things like TARGET_ARCH_X86=yes not being output to
> config.mak.
> 
> 
> 
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