remainderl-ieee: Work around test failure on OSF/1. * m4/remainderl-ieee.m4: New file. * m4/remainderl.m4 (gl_FUNC_REMAINDERL): If gl_FUNC_REMAINDERL_IEEE is present, test whether remainderl works with a zero second argument. Replace it if not. * lib/math.in.h (remainderl): Override if REPLACE_REMAINDERL is 1. * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_REMAINDERL. * modules/math (Makefile.am): Substitute REPLACE_REMAINDERL. * modules/remainderl (configure.ac): Consider REPLACE_REMAINDERL. (Depends-on): Update conditions. * modules/remainderl-ieee (Files): Add m4/remainderl-ieee.m4. (Depends-on): Add remainder-ieee. (configure.ac): Invoke gl_FUNC_REMAINDERL_IEEE. * doc/posix-functions/remainderl.texi: Mention the remainderl-ieee module.

--- a/modules/math
+++ b/modules/math
@@ -200,6 +200,7 @@
 	      -e 's|@''REPLACE_NAN''@|$(REPLACE_NAN)|g' \
 	      -e 's|@''REPLACE_REMAINDER''@|$(REPLACE_REMAINDER)|g' \
 	      -e 's|@''REPLACE_REMAINDERF''@|$(REPLACE_REMAINDERF)|g' \
+	      -e 's|@''REPLACE_REMAINDERL''@|$(REPLACE_REMAINDERL)|g' \
 	      -e 's|@''REPLACE_ROUND''@|$(REPLACE_ROUND)|g' \
 	      -e 's|@''REPLACE_ROUNDF''@|$(REPLACE_ROUNDF)|g' \
 	      -e 's|@''REPLACE_ROUNDL''@|$(REPLACE_ROUNDL)|g' \