ruby: configure mis-detects isnan/isinf on musl

The configure script does not detect isnan/isinf as macros
as is the case in musl:
    checking for isinf... no
    checking for isnan... no

Backport an upstream patch from 2.7.0-preview1 to address this:
    checking whether isinf is declared... yes
    checking whether isnan is declared... yes

(From OE-Core rev: b1afaccdba31341cace4b8d84d118ca76098587e)

Signed-off-by: André Draszik <andre.draszik@jci.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-devtools/ruby/ruby_2.5.5.bb b/meta/recipes-devtools/ruby/ruby_2.5.5.bb
index 4082b02f14..341329a6a1 100644
--- a/meta/recipes-devtools/ruby/ruby_2.5.5.bb
+++ b/meta/recipes-devtools/ruby/ruby_2.5.5.bb
@@ -1,6 +1,7 @@
 require ruby.inc
 
 SRC_URI += " \
+           file://0001-configure.ac-check-finite-isinf-isnan-as-macros-firs.patch \
            file://run-ptest \
            "