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configure.ac: use $protobuf_CFLAGS to find protobuf header files

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the protobuf header files may be installed in a non-standard location
and thus we need to use the CFLAGS registered for protobuf in pkg-config
in order to find them.

based on a patch from Andrei Nigmatulin.
This commit is contained in:
Robert Edmonds 2014-03-28 13:01:44 -04:00
parent 66005093be
commit e633dda6e4
1 changed files with 5 additions and 0 deletions
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5
configure.ac
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@ -39,9 +39,14 @@ AC_ARG_ENABLE([protoc],
if test "x$enable_protoc" != "xno"; then
AC_LANG_PUSH([C++])
PKG_CHECK_MODULES([protobuf], [protobuf])
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$save_CPPFLAGS $protobuf_CFLAGS"
AC_CHECK_HEADERS([google/protobuf/compiler/command_line_interface.h],
[],
[AC_MSG_ERROR([required protobuf header file not found])])
CPPFLAGS="$save_CPPFLAGS"
AC_PATH_PROG(PROTOC, protoc)
if test -z "$PROTOC"; then
AC_MSG_ERROR([Please install the protobuf compiler from https://code.google.com/p/protobuf/.])