ldbl-opt: Add error and error_at_line (bug 23984)

On platforms where long double may have the same format as double
(-mlong-double-64), error and error_at_line do not take that into
account and might produce wrong output if a long double conversion is
requested by the format string ('%Lf').  This patch adds compatibility
functions for this situation and redirects calls via header magic.

Tested for powerpc, powerpc64 and powerpc64le.

3 files changed, 26 insertions, 0 deletions

diff --git a/sysdeps/ieee754/ldbl-opt/Versions b/sysdeps/ieee754/ldbl-opt/Versions
index 5d6051a12d..21a2db6888 100644
--- a/sysdeps/ieee754/ldbl-opt/Versions
+++ b/sysdeps/ieee754/ldbl-opt/Versions
@@ -82,6 +82,7 @@ libc {
     __nldbl_argp_error; __nldbl_argp_failure;
     __nldbl_warn; __nldbl_vwarn; __nldbl_warnx; __nldbl_vwarnx;
     __nldbl_err; __nldbl_verr; __nldbl_errx; __nldbl_verrx;
+    __nldbl_error; __nldbl_error_at_line;
   }
 }
 libm {
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
index 6883814d58..86ac418007 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
@@ -24,6 +24,7 @@
 
 #include <argp.h>
 #include <err.h>
+#include <error.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <libio/strfile.h>
@@ -1072,6 +1073,27 @@ __nldbl_vwarnx (const char *format, __gnuc_va_list ap)
   __vwarnx_internal (format, ap, PRINTF_LDBL_IS_DBL);
 }
 
+void
+__nldbl_error (int status, int errnum, const char *message, ...)
+{
+  va_list ap;
+  va_start (ap, message);
+  __error_internal (status, errnum, message, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
+}
+
+void
+__nldbl_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_IS_DBL);
+  va_end (ap);
+}
+
 #if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
 compat_symbol (libc, __nldbl__IO_printf, _IO_printf, GLIBC_2_0);
 compat_symbol (libc, __nldbl__IO_sprintf, _IO_sprintf, GLIBC_2_0);
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-compat.h b/sysdeps/ieee754/ldbl-opt/nldbl-compat.h
index eeda11b420..aed1cc1497 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-compat.h
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-compat.h
@@ -28,6 +28,7 @@
 #define __NO_LONG_DOUBLE_MATH	1
 #include <argp.h>
 #include <err.h>
+#include <error.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdint.h>
@@ -88,6 +89,8 @@ NLDBL_DECL (err);
 NLDBL_DECL (verr);
 NLDBL_DECL (errx);
 NLDBL_DECL (verrx);
+NLDBL_DECL (error);
+NLDBL_DECL (error_at_line);
 
 /* These do not exist in the normal interface, but must exist in the
    __nldbl interface so that they can be called from libnldbl.  */