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-rw-r--r--build-aux/m4/bitcoin_subdir_to_include.m414
1 files changed, 14 insertions, 0 deletions
diff --git a/build-aux/m4/bitcoin_subdir_to_include.m4 b/build-aux/m4/bitcoin_subdir_to_include.m4
new file mode 100644
index 0000000000..66f106c7d4
--- /dev/null
+++ b/build-aux/m4/bitcoin_subdir_to_include.m4
@@ -0,0 +1,14 @@
+dnl BITCOIN_SUBDIR_TO_INCLUDE([CPPFLAGS-VARIABLE-NAME],[SUBDIRECTORY-NAME],[HEADER-FILE])
+dnl SUBDIRECTORY-NAME must end with a path separator
+AC_DEFUN([BITCOIN_SUBDIR_TO_INCLUDE],[
+ if test "x$2" = "x"; then
+ AC_MSG_RESULT([default])
+ else
+ echo "#include <$2$3.h>" >conftest.cpp
+ newinclpath=`${CXXCPP} ${CPPFLAGS} -M conftest.cpp 2>/dev/null | [ tr -d '\\n\\r\\\\' | sed -e 's/^.*[[:space:]:]\(\/[^[:space:]]*\)]$3[\.h[[:space:]].*$/\1/' -e t -e d`]
+ AC_MSG_RESULT([${newinclpath}])
+ if test "x${newinclpath}" != "x"; then
+ eval "$1=\"\$$1\"' -I${newinclpath}'"
+ fi
+ fi
+])