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arm: Define with_float to hard when target name ends with hf

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On arm, the --with-float= configure option is used to define include
files search path (among other things).  However, when targeting
arm-linux-gnueabihf, one would expect to automatically default to the
hard-float ABI, but this is not the case. As a consequence, GCC
bootstrap fails on an arm-linux-gnueabihf target if --with-float=hard
is not used.

This patch checks if the target name ends with 'hf' and defines
with_float to hard if not already defined.  This is achieved in
gcc/config.gcc, just before selecting the default CPU depending on the
$with_float value.

2022-08-17  Christophe Lyon  <christophe.lyon@arm.com>

	gcc/
	* config.gcc (arm): Define with_float to hard if target name ends
	with 'hf'.
This commit is contained in:
Christophe Lyon 2022-08-17 10:06:24 +02:00
parent bac07a1da2
commit 06bca6950b
1 changed files with 7 additions and 0 deletions
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7
gcc/config.gcc
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@ -1314,6 +1314,13 @@ arm*-*-linux-* | arm*-*-uclinuxfdpiceabi)
tm_file="$tm_file arm/uclinuxfdpiceabi.h"
;;
esac
# Define with_float to "hard" if not already defined and
# target name ends with "hf"
case $target:$with_float in
arm*-*-*hf:)
with_float=hard
;;
esac
# Generation of floating-point instructions requires at least ARMv5te.
if [ "$with_float" = "hard" -o "$with_float" = "softfp" ] ; then
target_cpu_cname="arm10e"