Revert "meson: switch to gcc"

This reverts commit 5654ad9.

This breaks copr build.

configure.meson

@@ -10,6 +10,7 @@ fi
 TOP=$(dirname "$0")
 
 meson setup \
+  --native-file $TOP/fdpp/toolchain.ini \
   --cross-file $TOP/fdpp/kernel/toolchain.ini \
   $* $BLD $TOP
 [ "$?" = "0" ] || exit 1

fdpp/kernel/toolchain.ini

@@ -1,8 +1,8 @@
 [binaries]
 nasm = 'nasm-segelf'
-c = 'gcc'
+c = 'clang'
 c_ld = 'bfd'
-cpp = 'g++'
+cpp = 'clang++'
 strip = 'llvm-strip'
 pkg-config = 'pkg-config'
 

fdpp/meson.build

@@ -133,7 +133,7 @@ hdr = ['src', 'hdr', '.', rel_inc]
 incdir2 = include_directories(hdr)
 CLANG_VER = meson.get_compiler('cpp').version().split('.')[0]
 if get_option('buildtype').startswith('debug')
-  DEBUG_OPTS = ['-DFDPP_DEBUG', '-DEXTRA_DEBUG']
+  DEBUG_OPTS = ['-DFDPP_DEBUG', '-DEXTRA_DEBUG', '-fdebug-macro']
 else
   DEBUG_OPTS = []
 endif
@@ -142,7 +142,9 @@ LIBFDPP = shared_library('fdpp', [ccfiles, ppccf, FDPP_CCFILES, CPPFILES],
   version: FVER,
   sources: [gad, pac, pap, tc, ta],
   cpp_args: ['-DFDPP', '-DDEBUG', '-DWITHFAT32', '-DCLANG_VER=' + CLANG_VER,
-      DEBUG_OPTS
+      '-fno-threadsafe-statics',
+      '-Werror=packed-non-pod', '-Wno-unknown-warning-option',
+      '-Wno-format-invalid-specifier', '-Wno-c99-designator', DEBUG_OPTS
   ],
   link_args: ['-Wl,-Bsymbolic'],
   install: true,

fdpp/toolchain.ini

@@ -0,0 +1,2 @@
+[binaries]
+cpp = 'clang++'