diff -up libcap-2.25/Make.Rules.rh libcap-2.25/Make.Rules
--- libcap-2.25/Make.Rules.rh	2016-04-11 18:52:01.418065682 +0200
+++ libcap-2.25/Make.Rules	2016-04-11 18:52:10.790113866 +0200
@@ -49,7 +49,8 @@ KERNEL_HEADERS := $(topdir)/libcap/inclu
 IPATH += -fPIC -I$(KERNEL_HEADERS) -I$(topdir)/libcap/include
 
 CC := gcc
-CFLAGS := -O2 -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
+CFLAGS := $(RPM_OPT_FLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
+
 BUILD_CC := $(CC)
 BUILD_CFLAGS := $(CFLAGS) $(IPATH)
 AR := ar
@@ -60,7 +61,7 @@ WARNINGS=-Wall -Wwrite-strings \
         -Wstrict-prototypes -Wmissing-prototypes \
         -Wnested-externs -Winline -Wshadow
 LD=$(CC) -Wl,-x -shared
-LDFLAGS := #-g
+LDFLAGS := $(RPM_LD_FLAGS) #-g
 BUILD_GPERF := $(shell which gperf >/dev/null 2>/dev/null && echo yes)
 
 SYSTEM_HEADERS = /usr/include