[PATCH] config/ACPI: Add option to disable building of ACPI support on Linux

[Egbert Eich]

ACPI support in the Xserver was used to restore the console mode
prior to a power management event. This was to ensure the mode
upon suspend/resume was one that the system firmware or kernel
could deal with.
The feature depended on acpid to be running. Most of this functionality
is now take over by systemd, KMS drivers don't require a mode restoration
anyhow. Therefore it should be possible to disable this feature under
some circumstances.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c6ecba4..715840d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -635,6 +635,7 @@ AC_ARG_ENABLE(windowswm,      AS_HELP_STRING([--enable-windowswm], [Build XWin w
 AC_ARG_ENABLE(libdrm,         AS_HELP_STRING([--enable-libdrm], [Build Xorg with libdrm support (default: enabled)]), [DRM=$enableval],[DRM=yes])
 AC_ARG_ENABLE(clientids,      AS_HELP_STRING([--disable-clientids], [Build Xorg with client ID tracking (default: enabled)]), [CLIENTIDS=$enableval], [CLIENTIDS=yes])
 AC_ARG_ENABLE(pciaccess, AS_HELP_STRING([--enable-pciaccess], [Build Xorg with pciaccess library (default: enabled)]), [PCI=$enableval], [PCI=yes])
+AC_ARG_ENABLE(linux_acpi, AC_HELP_STRING([--disable-linux-acpi], [Disable building ACPI support on Linux (if available).]), [enable_linux_acpi=$enableval], [enable_linux_acpi=yes])
 
 dnl DDXes.
 AC_ARG_ENABLE(xorg,    	      AS_HELP_STRING([--enable-xorg], [Build Xorg server (default: auto)]), [XORG=$enableval], [XORG=auto])
@@ -1712,7 +1713,7 @@ if test "x$XORG" = xyes; then
 		  	linux_alpha=yes
 			;;
 		  i*86|amd64*|x86_64*|ia64*)
-			linux_acpi="yes"
+			linux_acpi=$enable_linux_acpi
 			;;
 		  *)
 			;;
-- 
1.8.1.4