From: Tobias Burnus <tobias@codesourcery.com>
Date: Mon, 19 Jun 2023 08:24:08 +0000 (+0200)
Subject: Doc update: -foffload-options= examples + OpenMP in Fortran intrinsic modules
X-Git-Tag: basepoints/gcc-15~8203
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9c1679c350be09cec5354a3d98915c3afe02c87;p=thirdparty%2Fgcc.git

Doc update: -foffload-options= examples + OpenMP in Fortran intrinsic modules

With LTO, the -O.. flags of the host are passed on to the lto compiler, which
also includes offloading compilers. Therefore, using --foffload-options=-O3 is
misleading as it implies that without the default optimizations are used. Hence,
this flags has now been removed from the usage examples.

The Fortran documentation lists the content (except for API routines) routines
of the intrinsic OpenMP modules OMP_LIB and OMP_LIB_KINDS; this commit adds
two missing named constants and links also to the OpenMP 5.1 and 5.2
OpenMP spec for completeness.

gcc/ChangeLog:

	* doc/invoke.texi (-foffload-options): Remove '-O3' from the examples.

gcc/fortran/ChangeLog:

	* intrinsic.texi (OpenMP Modules OMP_LIB and OMP_LIB_KINDS): Also
	add references to the OpenMP 5.1 and 5.2 spec; add omp_initial_device
	and omp_invalid_device named constants.
---

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index fafdee30f666..215ab0dd05c3 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -2718,7 +2718,7 @@ Typical command lines are
 
 @smallexample
 -foffload-options='-fno-math-errno -ffinite-math-only' -foffload-options=nvptx-none=-latomic
--foffload-options=amdgcn-amdhsa=-march=gfx906 -foffload-options=-O3
+-foffload-options=amdgcn-amdhsa=-march=gfx906
 @end smallexample
 
 @opindex fopenacc
diff --git a/gcc/fortran/intrinsic.texi b/gcc/fortran/intrinsic.texi
index 5555db227eae..6c7ad03a02c7 100644
--- a/gcc/fortran/intrinsic.texi
+++ b/gcc/fortran/intrinsic.texi
@@ -15247,8 +15247,9 @@ with the following options: @code{-fno-unsafe-math-optimizations
 @table @asis
 @item @emph{Standard}:
 OpenMP Application Program Interface v4.5,
-OpenMP Application Program Interface v5.0 (partially supported) and
-OpenMP Application Program Interface v5.1 (partially supported).
+OpenMP Application Program Interface v5.0 (partially supported),
+OpenMP Application Program Interface v5.1 (partially supported) and
+OpenMP Application Program Interface v5.2 (partially supported).
 @end table
 
 The OpenMP Fortran runtime library routines are provided both in
@@ -15262,9 +15263,13 @@ below.
 
 For details refer to the actual
 @uref{https://www.openmp.org/wp-content/uploads/openmp-4.5.pdf,
-OpenMP Application Program Interface v4.5} and
+OpenMP Application Program Interface v4.5},
 @uref{https://www.openmp.org/wp-content/uploads/OpenMP-API-Specification-5.0.pdf,
-OpenMP Application Program Interface v5.0}.
+OpenMP Application Program Interface v5.0},
+@uref{https://www.openmp.org/wp-content/uploads/OpenMP-API-Specification-5-1.pdf,
+OpenMP Application Program Interface v5.1} and
+@uref{https://www.openmp.org/wp-content/uploads/OpenMP-API-Specification-5-2.pdf,
+OpenMP Application Program Interface v5.2}.
 
 @code{OMP_LIB_KINDS} provides the following scalar default-integer
 named constants:
@@ -15295,6 +15300,13 @@ The following derived type:
 @item @code{omp_alloctrait}
 @end table
 
+The following scalar default-integer named constants:
+@table @asis
+@item @code{omp_initial_device}
+@item @code{omp_invalid_device}
+@end table
+
+
 The following scalar integer named constants of the
 kind @code{omp_sched_kind}: