9 files changed, 19 insertions, 8 deletions
diff --git a/dev-lang/php/php-7.2.29.ebuild b/dev-lang/php/php-7.2.29.ebuild
index e00a2f8c2da9..8f686aeaf0f9 100644
--- a/dev-lang/php/php-7.2.29.ebuild
+++ b/dev-lang/php/php-7.2.29.ebuild
@@ -18,7 +18,7 @@ LICENSE="PHP-3.01
 	unicode? ( BSD-2 LGPL-2.1 )"
 
 SLOT="$(ver_cut 1-2)"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
+KEYWORDS="~alpha amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ppc ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
 
 # We can build the following SAPIs in the given order
 SAPIS="embed cli cgi fpm apache2 phpdbg"
diff --git a/dev-lang/php/php-7.3.16.ebuild b/dev-lang/php/php-7.3.16.ebuild
index 4479bee944cf..7ddd48eb6972 100644
--- a/dev-lang/php/php-7.3.16.ebuild
+++ b/dev-lang/php/php-7.3.16.ebuild
@@ -19,7 +19,7 @@ LICENSE="PHP-3.01
 	unicode? ( BSD-2 LGPL-2.1 )"
 
 SLOT="$(ver_cut 1-2)"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
+KEYWORDS="~alpha amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ppc ppc64 ~s390 ~sh sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
 
 S="${WORKDIR}/${PN}-${MY_PV}"
 
diff --git a/dev-lang/php/php-7.4.4.ebuild b/dev-lang/php/php-7.4.4.ebuild
index da9646737ff2..c0fbe2e4da44 100644
--- a/dev-lang/php/php-7.4.4.ebuild
+++ b/dev-lang/php/php-7.4.4.ebuild
@@ -21,7 +21,7 @@ LICENSE="PHP-3.01
 	unicode? ( BSD-2 LGPL-2.1 )"
 
 SLOT="$(ver_cut 1-2)"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
+KEYWORDS="~alpha amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ppc ppc64 ~s390 ~sh sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
 
 S="${WORKDIR}/${PN}-${MY_PV}"
 
diff --git a/dev-python/fields/fields-5.0.0-r2.ebuild b/dev-python/fields/fields-5.0.0-r2.ebuild
index d3b1edcefe08..bd683b2cdacd 100644
--- a/dev-python/fields/fields-5.0.0-r2.ebuild
+++ b/dev-python/fields/fields-5.0.0-r2.ebuild
@@ -12,7 +12,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="BSD-2"
 SLOT="0"
-KEYWORDS="~alpha amd64 ~arm arm64 ~ia64 ~mips ppc ppc64 ~s390 sparc x86"
+KEYWORDS="~alpha amd64 ~arm arm64 ia64 ~mips ppc ppc64 ~s390 sparc x86"
 IUSE="test"
 
 DEPEND="test? (
diff --git a/dev-python/inflect/inflect-4.1.0.ebuild b/dev-python/inflect/inflect-4.1.0.ebuild
index 8ca7c2d7780c..d09897508ba9 100644
--- a/dev-python/inflect/inflect-4.1.0.ebuild
+++ b/dev-python/inflect/inflect-4.1.0.ebuild
@@ -15,7 +15,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~x86"
+KEYWORDS="~alpha amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~x86"
 IUSE="test"
 RESTRICT="!test? ( test )"
 
diff --git a/dev-python/markupsafe/markupsafe-1.1.1.ebuild b/dev-python/markupsafe/markupsafe-1.1.1.ebuild
index 4d6c5ad7804e..5380fe985101 100644
--- a/dev-python/markupsafe/markupsafe-1.1.1.ebuild
+++ b/dev-python/markupsafe/markupsafe-1.1.1.ebuild
@@ -16,7 +16,7 @@ SRC_URI="mirror://pypi/${MY_PN:0:1}/${MY_PN}/${MY_P}.tar.gz"
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="~alpha amd64 ~arm arm64 ~hppa ~ia64 ~mips ppc ppc64 ~s390 ~sh sparc x86 ~amd64-linux ~x86-linux ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris"
+KEYWORDS="~alpha amd64 ~arm arm64 ~hppa ia64 ~mips ppc ppc64 ~s390 ~sh sparc x86 ~amd64-linux ~x86-linux ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris"
 
 BDEPEND="dev-python/setuptools[${PYTHON_USEDEP}]"
 
diff --git a/dev-python/pytest-cov/pytest-cov-2.8.1.ebuild b/dev-python/pytest-cov/pytest-cov-2.8.1.ebuild
index 8b078bb0b671..4727c21bcc31 100644
--- a/dev-python/pytest-cov/pytest-cov-2.8.1.ebuild
+++ b/dev-python/pytest-cov/pytest-cov-2.8.1.ebuild
@@ -13,7 +13,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha amd64 ~arm arm64 ~ia64 ~mips ppc ppc64 ~s390 ~sparc x86"
+KEYWORDS="~alpha amd64 ~arm arm64 ia64 ~mips ppc ppc64 ~s390 ~sparc x86"
 IUSE="test"
 RESTRICT="!test? ( test )"
 
diff --git a/dev-python/zipp/zipp-2.0.1.ebuild b/dev-python/zipp/zipp-2.0.1.ebuild
index 91052cdf13a2..c87a160aa14d 100644
--- a/dev-python/zipp/zipp-2.0.1.ebuild
+++ b/dev-python/zipp/zipp-2.0.1.ebuild
@@ -15,7 +15,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm ~arm64 ~hppa ~ia64 ~mips ppc ppc64 s390 sparc x86"
+KEYWORDS="~alpha amd64 arm ~arm64 ~hppa ia64 ~mips ppc ppc64 s390 sparc x86"
 IUSE="test"
 
 RDEPEND="dev-python/more-itertools[${PYTHON_USEDEP}]"
diff --git a/eclass/flag-o-matic.eclass b/eclass/flag-o-matic.eclass
index 9ef9ac3685e0..e76eef293e89 100644
--- a/eclass/flag-o-matic.eclass
+++ b/eclass/flag-o-matic.eclass
@@ -487,6 +487,17 @@ test-flag-PROG() {
 
 	printf "%s\n" "${in_src}" > "${test_in}" || die "Failed to create '${test_in}'"
 
+	# Currently we rely on warning-free output of a compiler
+	# before the flag to see if a flag prduces any warnings.
+	# This has a few drawbacks:
+	# - if compiler already generates warnings we filter out
+	#   every single flag: bug #712488
+	# - if user actually wants to see warnings we just strip
+	#   them regardless of warnings type.
+	#
+	# We can add more selective detection of no-op flags via
+	# '-Werror=ignored-optimization-argument' and similar error options
+	# similar to what we are doing with '-Qunused-arguments'.
 	local cmdline=(
 		"${comp[@]}"
 		# Clang will warn about unknown gcc flags but exit 0.