[PATCH] acpica: fwts_acpica: fix linker issues on Fedora (LP: #1712572)

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

When building for ppcC64el on Fedora we get linker issues with
undefined symbols. It seems that while this is not an issue on
Debian systems, the linker seems to require these sysbols to be
defined even if we don't actually use them. Make these functions
void no-ops that throw warnings if they are used.  This has been
tested on Fedora 25 and also Ubuntu and is able to build and
pass the regression tests.

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/acpica/fwts_acpica.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/src/acpica/fwts_acpica.c b/src/acpica/fwts_acpica.c
index b85e18d6..b0cefe73 100644
--- a/src/acpica/fwts_acpica.c
+++ b/src/acpica/fwts_acpica.c
@@ -1326,4 +1326,40 @@ fwts_list *fwts_acpica_get_object_names(int type)
 	return list;
 }
 
+#else
+
+static void __void_func(const char *funcname)
+{
+	fprintf(stderr, "fwts ACPICA library: unexpected call to %s()\n", funcname);
+	exit(EXIT_FAILURE);
+}
+
+#define VOID_FUNC(name) void name(void) { __void_func(#name); }
+
+/*
+ *  With ACPI disabled, these functions should never
+ *  be called. We should defined this otherwise we will
+ *  get linker errors with some autotools/linker combos
+ */
+VOID_FUNC(AcpiGbl_IgnoreErrors)
+VOID_FUNC(AcpiGbl_RegionFillValue)
+
+VOID_FUNC(AcpiOsCreateSemaphore)
+VOID_FUNC(AcpiOsDeleteSemaphore)
+VOID_FUNC(AcpiOsExecute)
+VOID_FUNC(AcpiOsGetRootPointer)
+VOID_FUNC(AcpiOsPrintf)
+VOID_FUNC(AcpiOsReadPciConfiguration)
+VOID_FUNC(AcpiOsReadPort)
+VOID_FUNC(AcpiOsSignal)
+VOID_FUNC(AcpiOsSignalSemaphore)
+VOID_FUNC(AcpiOsSleep)
+VOID_FUNC(AcpiOsVprintf)
+VOID_FUNC(AcpiOsWaitSemaphore)
+
+VOID_FUNC(AeTableOverride)
+
+VOID_FUNC(MpSaveGpioInfo)
+VOID_FUNC(MpSaveSerialInfo)
+
 #endif
-- 
2.14.1