From b46aad6df449445a9fc4aa7b32bd40005438e3f7 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 13 Apr 2024 14:18:05 +0200
Subject: Adding upstream version 2.9.5.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 include/make/compiler.mk | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 include/make/compiler.mk

(limited to 'include/make/compiler.mk')

diff --git a/include/make/compiler.mk b/include/make/compiler.mk
new file mode 100644
index 0000000..f251693
--- /dev/null
+++ b/include/make/compiler.mk
@@ -0,0 +1,42 @@
+# WARNING: Do not change cc-opt, cc-opt-alt or cc-warning without checking if
+#          clang bug #49364 is fixed. stderr is redirected to /dev/null on
+#          purpose, to work around a clang 11 bug that crashes if stderr is
+#          redirected to stdin.
+#
+# Function used to detect support of a given option by the compiler.
+# Usage: CFLAGS += $(call cc-opt,option). Eg: $(call cc-opt,-fwrapv)
+# Note: ensure the referencing variable is assigned using ":=" and not "=" to
+#       call it only once.
+cc-opt = $(shell set -e; if $(CC) -Werror $(1) -E -xc - -o /dev/null </dev/null >&0 2>/dev/null; then echo "$(1)"; fi;)
+
+# same but tries with $2 if $1 is not supported
+cc-opt-alt = $(if $(shell set -e; if $(CC) -Werror $(1) -E -xc - -o /dev/null </dev/null >&0 2>/dev/null; then echo 1;fi),$(1),$(call cc-opt,$(2)))
+
+# validate a list of options one at a time
+cc-all-opts  = $(foreach a,$(1),$(call cc-opt,$(a)))
+
+# try to pass plenty of options at once, take them on success or try them
+# one at a time on failure and keep successful ones. This is handy to quickly
+# validate most common options.
+cc-all-fast = $(if $(call cc-opt,$(1)),$(1),$(call cc-all-opts,$(1)))
+
+# Below we verify that the compiler supports any -Wno-something option to
+# disable any warning, or if a special option is needed to achieve that. This
+# will allow to get rid of testing when the compiler doesn't care. The result
+# is made of two variables:
+#  - cc-anywno that's non-empty if the compiler supports disabling anything
+#  - cc-wnouwo that may contain an option needed to enable this behavior
+# Gcc 4.x and above do not need any option but will still complain about unknown
+# options if another warning or error happens, and as such they're not testable.
+# Clang needs a special option -Wno-unknown-warning-option. Compilers not
+# supporting this option will check all warnings individually.
+cc-anywno := $(call cc-opt,-Wno-haproxy-warning)
+cc-wnouwo := $(if $(cc-anywno),,$(call cc-opt,-Wno-unknown-warning-option))
+cc-anywno := $(if $(cc-anywno)$(cc-wnouwo),1)
+
+# Disable a warning when supported by the compiler. Don't put spaces around the
+# warning! And don't use cc-opt which doesn't always report an error until
+# another one is also returned. If "cc-anywno" is set, the compiler supports
+# -Wno- followed by anything so we don't even need to start the compiler.
+# Usage: CFLAGS += $(call cc-nowarn,warning). Eg: $(call cc-opt,format-truncation)
+cc-nowarn = $(if $(cc-anywno),-Wno-$(1),$(shell set -e; if $(CC) -Werror -W$(1) -E -xc - -o /dev/null </dev/null >&0 2>/dev/null; then echo "-Wno-$(1)"; fi;))
-- 
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