[sr-dev] plan for finding dependencies?

[I've been working through making kamailio build on NetBSD -- thanks for merging my recent PR with two small fixes.] In src/Makefile.defs, there is a setting of LOCALBASE, which is basically a case statement by OS. A few examples: Linux /usr/local presuambly the tradition /usr/local per autucoonf FreeBSD /usr/local hijacked by ports system - not traditional /usr/local NetBSD /usr/pkg pkgsrc puts things here (local is still local) There is a need for two separate prefixes when building something like this: where the software being built should be installed: basically like --prefix=/foo in autoconf where things that the software depends on should be found, sort of what autoconf would use for --with-bar=/baz, so that /baz/include is added to CPPFLAGS and "-L/baz/lib -R/baz/lib" to LDFLAGS. I needed to add the C_INCLUDES as ifeq ($(OS), netbsd) C_INCLUDES+= -I$(LOCALBASE)/include since otherwise a libxml2 header is not found (and with the above it builds fine): gcc -fPIC -DPIC -g -funroll-loops -Wcast-align -m64 -minline-all-stringops -falign-loops -ftree-vectorize -fno-strict-overflow -mtune=generic -Wall -DNAME='"kamailio"' -DVERSION='"5.4.0-dev3"' -DARCH='"x86_64"' -DOS='netbsd_' -DOS_QUOTED='"netbsd"' -DCOMPILER='"gcc 5.5.0"' -D__CPU_x86_64 -D__OS_netbsd -DVERSIONVAL=5004000 -DCFG_DIR='"/usr/pkg/etc/kamailio/"' -DSHARE_DIR='"/usr/pkg/share/kamailio/"' -DRUN_DIR='"/var/run/kamailio/"' -DPKG_MALLOC -DSHM_MMAP -DDNS_IP_HACK -DUSE_MCAST -DUSE_TCP -DDISABLE_NAGLE -DHAVE_RESOLV_RES -DUSE_DNS_CACHE -DUSE_DNS_FAILOVER -DUSE_DST_BLACKLIST -DUSE_NAPTR -DWITH_XAVP -DMEM_JOIN_FREE -DF_MALLOC -DQ_MALLOC -DTLSF_MALLOC -DDBG_SR_MEMORY -DUSE_TLS -DTLS_HOOKS -DUSE_CORE_STATS -DSTATISTICS -DMALLOC_STATS -DUSE_SCTP -DFAST_LOCK -DADAPTIVE_WAIT -DADAPTIVE_WAIT_LOOPS=1024 -DCC_GCC_LIKE_ASM -DHAVE_SOCKADDR_SA_LEN -DHAVE_GETHOSTBYNAME2 -DHAVE_MSGHDR_MSG_CONTROL -DHAVE_CONNECT_ECONNRESET_BUG -DHAVE_TIMEGM -DHAVE_SELECT -I/usr/pkg/include/libxml2 -I/usr/include -DMOD_NAME='"ims_registrar_pcscf"' -c notify.c -o notify.o -MMD -MP notify.c:38:36: fatal error: libxml2/libxml/globals.h: No such file or directory Of course, on Linux this issue is usually avoided because everything is installed with --prefix=/usr which is in te default search path. So my questions are: Is LOCALBASE supposed to be where kamailio is built into? (If so, then /usr/pkg seems like a wrong default on NetBSD, following the autoconf /usr/local norm, even though pkgsrc builds would pass in /usr/pkg.) Or is it where dependencies are? (If so, why isn't LOCALBASE/include put in cflags?) If dependencies are supposed to be someplace else, what's the mechanism to look for them? C_INCLUDES is set to empty, so I can't pass that in. Shouldn't the plan be explained in INSTALL (and sorry if I missed it)? Even a very brief clue would be appreciated, so I can align my changes with the overall intent. Thanks, Greg