util: improve compiler guard

Glibc 2.26 has dropped xlocale.h, but the functions needed (strtod_l()
and strdof_l()) can be found in stdlib.h.
Improve the detection method to allow newer builds to still make use of
the locale-setting.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102454
Cc: Laurent Carlier <[email protected]>
Cc: Emil Velikov <[email protected]>
Cc: Rob Herring <[email protected]>
Signed-off-by: Eric Engestrom <[email protected]>
Reviewed-by: Laurent Carlier <[email protected]>
Reviewed-by: Jose Fonseca <[email protected]>
(cherry picked from commit 49b428470e28ae6ab22083e43fa41abf622f3b0d)

1 files changed, 16 insertions, 0 deletions

diff --git a/scons/gallium.py b/scons/gallium.py
index c8e47a39db1..1e35ef434a3 100755
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -157,6 +157,19 @@ def check_header(env, header):
     env = conf.Finish()
     return have_header
 
+def check_functions(env, functions):
+    '''Check if all of the functions exist'''
+
+    conf = SCons.Script.Configure(env)
+    have_functions = True
+
+    for function in functions:
+        if not conf.CheckFunc(function):
+            have_functions = False
+
+    env = conf.Finish()
+    return have_functions
+
 def check_prog(env, prog):
     """Check whether this program exists."""
 
@@ -339,6 +352,9 @@ def generate(env):
         if check_header(env, 'xlocale.h'):
             cppdefines += ['HAVE_XLOCALE_H']
 
+        if check_functions(env, ['strtod_l', 'strtof_l']):
+            cppdefines += ['HAVE_STRTOD_L']
+
     if platform == 'windows':
         cppdefines += [
             'WIN32',