[FFmpeg-trac] #3364(undetermined:new): Configure script fails to detect ARM Compiler 5.04

[FFmpeg]

#3364: Configure script fails to detect ARM Compiler 5.04
-------------------------------------+-------------------------------------
             Reporter:  statham-arm  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 ffmpeg's configure script attempts to detect the ARM C/C++ compiler by
 grepping the output of "armcc --vsn". As of ARM Compiler 5.04, the --vsn
 output format has changed, and the grep no longer successfully detects the
 compiler.

 For example, I ran the following configure command, with both ARM Compiler
 5.04 and CodeSourcery ARM 2009q3 on my path:

 {{{
 ./configure --extra-cflags="-O2 -marm" --cross-prefix=arm-none-linux-
 gnueabi- --sysroot=$CODESOURCERYDIR/arm-none-linux-gnueabi/libc --arch=arm
 --cc="armcc" --cross-prefix=arm-none-linux-gnueabi- --enable-gpl --enable-
 cross-compile --disable-asm --target-os=linux
 }}}

 and got the message

 {{{
 armcc is unable to create an executable file.
 C compiler test failed.
 }}}

 whereas with ARM Compiler 5.03, ffmpeg successfully configured itself.

 The problem is the line in the configure script which says

 {{{
     elif $_cc --vsn 2>/dev/null | grep -q "ARM C/C++ Compiler"; then
 }}}

 which works on 5.03, whose --vsn output includes a line saying

 {{{
 ARM C/C++ Compiler, 5.03 [Build 117]
 }}}

 but 5.04's version dump looks like this instead:

 {{{
 Product: ARM Compiler 5.04
 Component: ARM Compiler 5.04 (build 46)
 Tool: armcc [5040046]
 }}}

 So that regular expression should be changed for one that will match both
 these pieces of output. In particular, it's better to match the
 'Component: ARM Compiler' line than the 'Product:' line, since the latter
 can change to match larger products that ARM Compiler is being shipped as
 a component of.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3364>
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