As the automake documentation says: AM_CPPFLAGS: The contents of this variable are passed to every compilation that invokes the C preprocessor; it is a list of arguments to the preprocessor. For instance, -I and -D options should be listed here AM_CFLAGS: This is the variable the Makefile.am author can use to pass in additional C compiler flags. http://www.gnu.org/software/automake/manual/html_node/Program-Variables.html --- src/Makefile.am | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/Makefile.am b/src/Makefile.am index 649cbc5..f07d092 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -41,13 +41,14 @@ endif # Compiler/linker flags # ################################### -AM_CFLAGS = \ +AM_CPPFLAGS = \ -I$(top_srcdir)/src \ -I$(top_srcdir)/src/modules \ -I$(top_builddir)/src/modules \ - $(PTHREAD_CFLAGS) \ -DPA_ALSA_PATHS_DIR=\"$(alsapathsdir)\" \ -DPA_ALSA_PROFILE_SETS_DIR=\"$(alsaprofilesetsdir)\" +AM_CFLAGS = \ + $(PTHREAD_CFLAGS) AM_CXXFLAGS = $(AM_CFLAGS) SERVER_CFLAGS = -D__INCLUDED_FROM_PULSE_AUDIO -- 1.8.1.4