rename directories to use _ instead of -

Otherwise paths have both in them, following the usual C convention for _,
which is ugly.

Author: cirosantilli

README.md

@@ -2,7 +2,7 @@ import os.path
 env = Environment()
 x = ARGUMENTS.get('x', '0')
 env.Append(CPPDEFINES=['X=' + x])
-variant_dir = 'build-{}'.format(x)
+variant_dir = 'build_{}'.format(x)
 # duplicate: https://scons.org/doc/2.4.1/HTML/scons-user.html#idp1378838508
 # If on, by default uses hardlinks. Can be turned into softlinks with --duplicate=soft-copy.
 env.VariantDir(variant_dir, 'src', duplicate=1)

c-from-cpp/Makefile renamed to c_from_cpp/Makefile

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -eu
+scons --clean
+scons
+[ "$(./build_0/main.out)" = 0 ]
+[ ! -d build_1 ]
+scons x=1
+[ "$(./build_1/main.out)" = 1 ]

c-from-cpp/README.md renamed to c_from_cpp/README.md

@@ -7,22 +7,22 @@ top="$(pwd)"
 # make test
 for t in \
     c \
-    c-from-cpp \
+    c_from_cpp \
     c/extern \
     c/static/function \
     c/static/variable \
     cpp \
-    cpp-from-c \
+    cpp_from_c \
     cpp/extern_const \
     cpp/inline_variable \
     gcc \
     glibc \
-    linker/incremental-link \
-    linker/variable-address \
+    linker/incremental_link \
+    linker/variable_address \
     posix \
-    shared-library/basic \
-    shared-library/lib-lib-dependency \
-    shared-library/symbol-version \
+    shared_library/basic \
+    shared_library/lib_lib_dependency \
+    shared_library/symbol_version \
   ; do
   if ! make -C "$t" -j`nproc` test; then
     echo "TEST FAILED: $t"