[PATCH v2 11/30] ldbl-128ibm-compat: Add error.h functions

["Gabriel F. T. Gomes" <gabriel@inconstante.net.br>]

From: "Gabriel F. T. Gomes" <gabrielftg@linux.ibm.com>

No changes since v1.

-- 8< --
Use the recently added, internal functions, __error_at_line_internal and
__error_internal, to provide error.h functions that can take long double
arguments with IEEE binary128 format on platforms where long double can
also take double format or some non-IEEE format (currently, this means
powerpc64le).

Tested for powerpc64le.
---
 misc/errorP.h                                 | 28 ++++++++++
 sysdeps/ieee754/ldbl-128ibm-compat/Makefile   |  3 +-
 sysdeps/ieee754/ldbl-128ibm-compat/Versions   |  3 ++
 .../ldbl-128ibm-compat/ieee128-error.c        | 51 +++++++++++++++++++
 4 files changed, 84 insertions(+), 1 deletion(-)
 create mode 100644 misc/errorP.h
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/ieee128-error.c

diff --git a/misc/errorP.h b/misc/errorP.h
new file mode 100644
index 0000000000..c61c49cd61
--- /dev/null
+++ b/misc/errorP.h
@@ -0,0 +1,28 @@
+/* Prototypes for internal error.h functions.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+
+void
+__error_internal (int status, int errnum, const char *message,
+		  va_list args, unsigned int mode_flags);
+
+void
+__error_at_line_internal (int status, int errnum, const char *file_name,
+			  unsigned int line_number, const char *message,
+			  va_list args, unsigned int mode_flags);
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
index 6bb0bed2fc..a09209a2dd 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
@@ -175,7 +175,8 @@ CFLAGS-tst-ibm128-argp.c += -mabi=ibmlongdouble -Wno-psabi
 endif
 
 ifeq ($(subdir),misc)
-ldbl-extra-routines += err
+ldbl-extra-routines += err \
+		       error
 endif
 
 # Add IEEE binary128 files as make targets.
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Versions b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
index e2b3dda551..dead38cdcb 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Versions
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
@@ -192,5 +192,8 @@ libc {
     __errxieee128;
     __verrieee128;
     __verrxieee128;
+
+    __errorieee128;
+    __error_at_lineieee128;
   }
 }
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-error.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-error.c
new file mode 100644
index 0000000000..9c74e060d7
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-error.c
@@ -0,0 +1,51 @@
+/* Wrappers for error.h functions.  IEEE128 version.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdarg.h>
+#include <misc/errorP.h>
+#include <libio/libioP.h>
+
+#define IEEE128_ALIAS(name) \
+  strong_alias (___ieee128_##name, __##name##ieee128)
+
+#define IEEE128_DECL(name) ___ieee128_##name
+
+void
+IEEE128_DECL (error) (int status, int errnum, const char *message, ...)
+{
+  va_list ap;
+  va_start (ap, message);
+  __error_internal (status, errnum, message, ap,
+		    PRINTF_LDBL_USES_FLOAT128);
+  va_end (ap);
+}
+IEEE128_ALIAS (error)
+
+void
+IEEE128_DECL (error_at_line) (int status, int errnum,
+			      const char *file_name,
+			      unsigned int line_number,
+			      const char *message, ...)
+{
+  va_list ap;
+  va_start (ap, message);
+  __error_at_line_internal (status, errnum, file_name, line_number,
+			    message, ap, PRINTF_LDBL_USES_FLOAT128);
+  va_end (ap);
+}
+IEEE128_ALIAS (error_at_line)
-- 
2.21.0