package/clapack: fix comments

Provide appropriate comments for the powerpc and !powerpc cases.

Adapt armadillo's comments accordingly.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/armadillo/Config.in

@@ -1,14 +1,18 @@
 comment "armadillo needs a toolchain w/ C++"
 	depends on !BR2_INSTALL_LIBSTDCPP
-	depends on !(BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el) # clapack
-	depends on !(BR2_powerpc && BR2_TOOLCHAIN_USES_UCLIBC) # clapack
-	depends on !BR2_bfin # clapack
+	depends on !(BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el)
+	depends on !BR2_powerpc
+	depends on !BR2_bfin
+
+comment "armadillo needs an (e)glibc toolchain w/ C++"
+	depends on BR2_powerpc
+	depends on !BR2_INSTALL_LIBSTDCPP || BR2_TOOLCHAIN_USES_UCLIBC
 
 config BR2_PACKAGE_ARMADILLO
 	bool "armadillo"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !(BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el) # clapack
-	depends on !(BR2_powerpc && BR2_TOOLCHAIN_USES_UCLIBC) # clapack
+	depends on !BR2_powerpc || BR2_TOOLCHAIN_USES_GLIBC # clapack
 	depends on !BR2_bfin # clapack
 	select BR2_PACKAGE_CLAPACK
 	help

package/clapack/Config.in

@@ -1,9 +1,13 @@
+comment "clapack needs an (e)glibc toolchain"
+	depends on BR2_powerpc
+	depends on !BR2_TOOLCHAIN_USES_GLIBC
+
 config BR2_PACKAGE_CLAPACK
 	bool "cblas/clapack"
 	depends on !(BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el)
 	# _fpu_control is used on PowerPC, but not available with
-	# uClibc
-	depends on !(BR2_powerpc && BR2_TOOLCHAIN_USES_UCLIBC)
+	# uClibc or musl
+	depends on !BR2_powerpc || BR2_TOOLCHAIN_USES_GLIBC
 	# disable clapack on blackfin, it triggers "undefined symbol" failure
 	# because of the "_" symbol prefix:
 	# http://autobuild.buildroot.net/results/a28df0ba10803e6e54c2f8160bbd8190cba4d690/