ppc with spe: gcc 8 is the last supported version

target/config/Config.in.compiler

@@ -21,6 +21,7 @@ default ADK_TOOLCHAIN_GCC_METAG if ADK_TARGET_ARCH_METAG
 default ADK_TOOLCHAIN_GCC_NDS32 if ADK_TARGET_ARCH_NDS32
 default ADK_TOOLCHAIN_GCC_XTENSA if ADK_TARGET_ARCH_XTENSA && ADK_TARGET_BINFMT_FDPIC
 default ADK_TOOLCHAIN_GCC_7 if ADK_TARGET_ARCH_C6X # ICE with newer GCC
+default ADK_TOOLCHAIN_GCC_8 if ADK_TARGET_ARCH_PPC_WITH_SPE # last gcc version supporting SPE
 default ADK_TOOLCHAIN_GCC_10 if ADK_TARGET_ARCH_CRIS # no longer supported
 default ADK_TOOLCHAIN_GCC_10 if ADK_TARGET_CPU_SH_J2 # j2.patch
 default ADK_TOOLCHAIN_GCC_14 if ADK_TARGET_ARCH_NIOS2 # no longer supported
@@ -31,30 +32,35 @@ config ADK_TOOLCHAIN_GCC_GIT
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_NDS32
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_16
 	bool "16.2.0"
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_15
 	bool "15.3.0"
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_14
 	bool "14.4.0"
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_13
 	bool "13.4.0"
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_12
 	bool "12.5.0"
@@ -62,6 +68,7 @@ config ADK_TOOLCHAIN_GCC_12
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_LOONGARCH
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_11
 	bool "11.5.0"
@@ -70,6 +77,7 @@ config ADK_TOOLCHAIN_GCC_11
 	depends on !ADK_TARGET_ARCH_C6X
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_LOONGARCH
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_10
 	bool "10.5.0"
@@ -78,6 +86,7 @@ config ADK_TOOLCHAIN_GCC_10
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_NDS32
 	depends on !ADK_TARGET_ARCH_LOONGARCH
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_9
 	bool "9.5.0"
@@ -87,6 +96,7 @@ config ADK_TOOLCHAIN_GCC_9
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_NDS32
 	depends on !ADK_TARGET_ARCH_LOONGARCH
+	depends on !ADK_TARGET_ARCH_PPC_WITH_SPE
 
 config ADK_TOOLCHAIN_GCC_8
 	bool "8.5.0"