Setup system header wrappers for C++ on VxWorks
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Message ID 137EEBA0-A22B-4ECA-A975-F4071F44D6F1@adacore.com
State New
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Series
  • Setup system header wrappers for C++ on VxWorks
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Commit Message

Olivier Hainque Dec. 13, 2019, 4:35 p.m. UTC
Starting from VxWorks 7, the system comes with a Dinkumware
environment which requires the inclusion of "yvals.h" before other
system headers.  We provide wrapped versions of a few headers to
accommodate such constraints.
    
Initially proposed by Jérôme, this helps fix dozens of build issues
when activating libstdc++ on such environments.

Tested in accordance with the description in
https://gcc.gnu.org/ml/gcc-patches/2019-12/msg00911.html

Committing soon to mainline.

Olivier

2019-12-13  Jerome Lambourg  <lambourg@adaccore.com>
            Olivier Hainque  <hainque@adacore.com>
    
	gcc/
	* config/vxworks/_yvals.h: New file.
	* config/vxworks/_yvals-wrapper.h: New file.
 	* gcc/config/vxworks/math.h: Use it to wrap the VxWorks
 	math.h header.
	* gcc/config/vxworks/complex.h: Likewise.
	* gcc/config/vxworks/setjmp.h: Likewise.
	* gcc/config/vxworks/inttypes.h: Likewise.
	* config.gcc (*-*-vxworks*): Add system header wrappers
    	to extra_headers.
	(powerpc-*-vxworks*): Reuse the common extra_headers.
gcc/config.gcc                      | 16 +++++++++-
 gcc/config/vxworks/_yvals-wrapper.h | 44 ++++++++++++++++++++++++++++
 gcc/config/vxworks/_yvals.h         | 45 +++++++++++++++++++++++++++++
 gcc/config/vxworks/complex.h        | 28 ++++++++++++++++++
 gcc/config/vxworks/inttypes.h       | 28 ++++++++++++++++++
 gcc/config/vxworks/math.h           | 28 ++++++++++++++++++
 gcc/config/vxworks/setjmp.h         | 34 ++++++++++++++++++++++
 7 files changed, 222 insertions(+), 1 deletion(-)
 create mode 100644 gcc/config/vxworks/_yvals-wrapper.h
 create mode 100644 gcc/config/vxworks/_yvals.h
 create mode 100644 gcc/config/vxworks/complex.h
 create mode 100644 gcc/config/vxworks/inttypes.h
 create mode 100644 gcc/config/vxworks/math.h
 create mode 100644 gcc/config/vxworks/setjmp.h

Patch
diff mbox series

diff --git a/gcc/config.gcc b/gcc/config.gcc
index b09a3656be8..4790247a868 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -953,12 +953,15 @@  case ${target} in
 *-*-vxworks*)
   tmake_file=t-vxworks
   xm_defines=POSIX
+
   extra_options="${extra_options} vxworks.opt"
   extra_objs="$extra_objs vxworks.o"
+
   c_target_objs="${c_target_objs} vxworks-c.o"
   cxx_target_objs="${cxx_target_objs} vxworks-c.o"
   extra_headers="${extra_headers} ../vxworks/vxworks-predef.h"
   target_has_targetcm="yes"
+
   use_gcc_stdint=provide
   tm_file="${tm_file} vxworks-stdint.h"
 
@@ -968,6 +971,17 @@  case ${target} in
 
   extra_headers="${extra_headers} ../vxworks/_vxworks-versions.h"
 
+  # Starting from VxWorks 7, the system comes with a Dinkumware
+  # environment which requires the inclusion of "yvals.h" before other
+  # system headers.  We provide wrapped versions of a few headers to
+  # accomodate such constraints:
+
+  extra_headers="${extra_headers} ../vxworks/_yvals.h"
+  extra_headers="${extra_headers} ../vxworks/_yvals-wrapper.h"
+
+  extra_headers="${extra_headers} ../vxworks/math.h ../vxworks/complex.h"
+  extra_headers="${extra_headers} ../vxworks/inttypes.h ../vxworks/setjmp.h"
+
   case ${enable_threads} in
     no) ;;
     "" | yes | vxworks) thread_file='vxworks' ;;
@@ -2918,7 +2932,7 @@  powerpc-wrs-vxworks*)
 	tm_file="${tm_file} elfos.h gnu-user.h freebsd-spec.h rs6000/sysv4.h"
 	tmake_file="${tmake_file} rs6000/t-fprules rs6000/t-ppccomm rs6000/t-vxworks"
 	extra_options="${extra_options} rs6000/sysv4.opt"
-	extra_headers=ppc-asm.h
+        extra_headers="${extra_headers} ppc-asm.h"
 	case ${target} in
           *-vxworksmils*)
             tm_file="${tm_file} vx-common.h vxworksae.h rs6000/vxworks.h rs6000/vxworksmils.h"
diff --git a/gcc/config/vxworks/_yvals-wrapper.h b/gcc/config/vxworks/_yvals-wrapper.h
new file mode 100644
index 00000000000..e7b84c2174d
--- /dev/null
+++ b/gcc/config/vxworks/_yvals-wrapper.h
@@ -0,0 +1,44 @@ 
+/* This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+/* The VxWorks 7 environment for C++ is based on a Dinkumware toolchain,
+   where quite a few configuration parameters are exposed in a yvals.h header
+   file which needs to be included before other standard headers.
+
+   This header file provides a wrapper facility to achieve this in addition
+   to the common requirement to include vxWorks.h before anything else.  */
+
+#include <_vxworks-versions.h>
+
+#if _VXWORKS_MAJOR_GE(7) && defined(__cplusplus)
+
+#include <_yvals.h>
+
+#pragma push_macro("__cplusplus")
+#undef __cplusplus
+#include_next __HEADER_TO_WRAP
+#pragma pop_macro("__cplusplus")
+
+#else
+
+#include_next __HEADER_TO_WRAP
+
+#endif
diff --git a/gcc/config/vxworks/_yvals.h b/gcc/config/vxworks/_yvals.h
new file mode 100644
index 00000000000..f8b0818185c
--- /dev/null
+++ b/gcc/config/vxworks/_yvals.h
@@ -0,0 +1,45 @@ 
+/* This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef __GCC_YVALS_H
+#define __GCC_YVALS_H
+
+#include <_vxworks-versions.h>
+
+#if _VXWORKS_MAJOR_GE(7)
+
+/* We need to deactivate the definitions tailored for the Dinkumware
+   intrinsics, incompatible with a compilation by G++.  */
+
+#include <yvals.h>
+
+#undef _HAS_CPP17
+#define _HAS_CPP17 0
+
+#undef _HAS_CPP14
+#define _HAS_CPP14 0
+
+#undef _HAS_CPP11
+#define _HAS_CPP11 0
+
+#endif /* VxWorks MAJOR >= 7 */
+
+#endif /* __GCC_YVALS_H */
diff --git a/gcc/config/vxworks/complex.h b/gcc/config/vxworks/complex.h
new file mode 100644
index 00000000000..394671a8b49
--- /dev/null
+++ b/gcc/config/vxworks/complex.h
@@ -0,0 +1,28 @@ 
+/* This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef __GCC_COMPLEX_H
+#define __GCC_COMPLEX_H
+
+#define __HEADER_TO_WRAP <complex.h>
+#include <_yvals-wrapper.h>
+
+#endif
diff --git a/gcc/config/vxworks/inttypes.h b/gcc/config/vxworks/inttypes.h
new file mode 100644
index 00000000000..d7862a48253
--- /dev/null
+++ b/gcc/config/vxworks/inttypes.h
@@ -0,0 +1,28 @@ 
+/* This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef __GCC_INTTYPES_H
+#define __GCC_INTTYPES_H
+
+#define __HEADER_TO_WRAP <inttypes.h>
+#include <_yvals-wrapper.h>
+
+#endif
diff --git a/gcc/config/vxworks/math.h b/gcc/config/vxworks/math.h
new file mode 100644
index 00000000000..8cf31b477ba
--- /dev/null
+++ b/gcc/config/vxworks/math.h
@@ -0,0 +1,28 @@ 
+/* This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef __GCC_MATH_H
+#define __GCC_MATH_H
+
+#define __HEADER_TO_WRAP <math.h>
+#include <_yvals-wrapper.h>
+
+#endif
diff --git a/gcc/config/vxworks/setjmp.h b/gcc/config/vxworks/setjmp.h
new file mode 100644
index 00000000000..c625e612948
--- /dev/null
+++ b/gcc/config/vxworks/setjmp.h
@@ -0,0 +1,34 @@ 
+/* This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef __GCC_SETJMP_H
+#define __GCC_SETJMP_H
+
+/* Getting proper namespaces for c++ requires that don't alter the perception
+   that we are compiling for c++, unlike what _yvals-wrapper would do.
+   setjmp.h redoes a few of a the yvals.h things in its own fashion, so the
+   pre-inclusion of yvals.h on VxWorks 7 with __cplusplus defined isn't a
+   problem in this particular case.  */
+
+#include <_yvals.h>
+#include_next  <setjmp.h>
+
+#endif