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Today I've successfully built and installed Apache2 from pkgsrc on HP-UX. I 
had to change devel/apr/Makefile because HP-UX doesn't have kernel entropy 
source such as /dev/*random, and programs must use external collectors, e.g. 
prngd.

Attached is a patch for devel/apr/Makefile making it work on HP-UX. But I 
think Apache is not only package using /dev/urandom, and it may be "not 
found" not only on HP-UX. Isn't it possible to create a Makefile variable (or 
even buildlink script) to determine either kernel interface or external 
entropy collector usage from OS name, OS version, or user specified flags?

-- 
Andrey Zakharchenko

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--- Makefile.orig	Tue Jan 18 22:41:36 2005
+++ Makefile	Tue Jan 18 22:41:35 2005
@@ -27,7 +27,6 @@
 
 APR_CONFIGURE_ARGS= \
 		--prefix=${PREFIX} \
-		--with-devrandom=/dev/urandom \
 		--with-installbuilddir=${PREFIX}/libexec/apr
 
 APU_CONFIGURE_ARGS= \
@@ -39,6 +38,16 @@
 .include "../../mk/bsd.prefs.mk"
 .include "../../textproc/expat/buildlink3.mk"
 .include "options.mk"
+
+# HP-UX has no /dev/*random and must use external entropy collector
+.if ${OPSYS} == "HP-UX"
+DEPENDS+=	prngd-[0-9]*:../../security/prngd
+APR_CONFIGURE_ARGS+= \
+		--with-egd=/var/run/egd-pool
+.else
+APR_CONFIGURE_ARGS+= \
+		--with-devrandom=/dev/urandom
+.endif
 
 SUBST_CLASSES+=		conf
 SUBST_STAGE.conf=	pre-configure

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