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169 lines
5.5 KiB
169 lines
5.5 KiB
# Common version number defines for libcap
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LIBTITLE=libcap
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VERSION=2
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MINOR=48
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#
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## Optional prefixes:
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#
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# common 'packaging' directory
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FAKEROOT=$(DESTDIR)
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# Autoconf-style prefixes are activated when $(prefix) is defined.
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# Otherwise binaries and libraries are installed in /{lib,sbin}/,
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# header files in /usr/include/ and documentation in /usr/man/man?/.
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# These choices are motivated by the fact that getcap and setcap are
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# administrative operations that could be needed to recover a system.
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ifndef lib
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lib=$(shell ldd /usr/bin/ld|egrep "ld-linux|ld.so"|cut -d/ -f2)
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endif
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ifdef prefix
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exec_prefix=$(prefix)
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lib_prefix=$(exec_prefix)
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inc_prefix=$(lib_prefix)
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man_prefix=$(prefix)/share
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else
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prefix=/usr
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exec_prefix=
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lib_prefix=$(exec_prefix)
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inc_prefix=$(prefix)
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man_prefix=$(prefix)/share
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endif
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# Target directories
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MANDIR=$(man_prefix)/man
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SBINDIR=$(exec_prefix)/sbin
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INCDIR=$(inc_prefix)/include
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LIBDIR=$(lib_prefix)/$(lib)
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PKGCONFIGDIR=$(LIBDIR)/pkgconfig
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GOPKGDIR=$(prefix)/share/gocode/src
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# Once go1.16 is released, I plan to set this value to 1 and keep it
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# there. The Go packages should always remain backwardly compatible,
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# but I may have to up it if Go's syntax dramatically changes in a
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# backwards incompatible manner. (Let's hope not.)
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GOMAJOR=0
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# Compilation specifics
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KERNEL_HEADERS := $(topdir)/libcap/include/uapi
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IPATH += -fPIC -I$(KERNEL_HEADERS) -I$(topdir)/libcap/include
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CC := $(CROSS_COMPILE)gcc
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DEFINES := -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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COPTS ?= -O2
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CFLAGS ?= $(COPTS) $(DEFINES)
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BUILD_CC ?= $(CC)
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BUILD_COPTS ?= -O2
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BUILD_CFLAGS ?= $(BUILD_COPTS) $(DEFINES) $(IPATH)
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AR := $(CROSS_COMPILE)ar
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RANLIB := $(CROSS_COMPILE)ranlib
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DEBUG = -g #-DDEBUG
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WARNINGS=-Wall -Wwrite-strings \
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-Wpointer-arith -Wcast-qual -Wcast-align \
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-Wstrict-prototypes -Wmissing-prototypes \
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-Wnested-externs -Winline -Wshadow
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LD=$(CC) -Wl,-x -shared
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LDFLAGS ?= #-g
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LIBCAPLIB := -L$(topdir)/libcap -lcap
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PSXLINKFLAGS := -lpthread -Wl,-wrap,pthread_create
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LIBPSXLIB := -L$(topdir)/libcap -lpsx $(PSXLINKFLAGS)
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BUILD_GPERF := $(shell which gperf >/dev/null 2>/dev/null && echo yes)
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SYSTEM_HEADERS = /usr/include
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INCS=$(topdir)/libcap/include/sys/capability.h
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LDFLAGS += -L$(topdir)/libcap
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CFLAGS += -Dlinux $(WARNINGS) $(DEBUG)
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INDENT := $(shell if [ -n "$$(which indent 2>/dev/null)" ]; then echo "| indent -kr" ; fi)
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# SHARED tracks whether or not the SHARED libraries (libcap.so,
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# libpsx.so and pam_cap.so) are built. (Some environments don't
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# support shared libraries.)
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SHARED ?= yes
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# DYNAMIC controls how capsh etc are linked - to shared or static libraries
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DYNAMIC := $(shell if [ ! -d "$(topdir)/.git" ]; then echo $(SHARED); else echo no ; fi)
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PAM_CAP ?= $(shell if [ -f /usr/include/security/pam_modules.h ]; then echo $(SHARED) ; else echo no ; fi)
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# If your system does not support pthreads, override this as "no".
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#
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# make PTHREADS=no ...
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#
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# This implies no Go support and no C/C++ libpsx build. Why might you
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# need libpsx for non-Go use? Tl;dr for POSIX semantics security:
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#
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# https://sites.google.com/site/fullycapable/who-ordered-libpsx
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#
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PTHREADS ?= yes
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ifeq ($(PTHREADS),yes)
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GO ?= go
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GOLANG ?= $(shell if [ -n "$(shell $(GO) version 2>/dev/null)" ]; then echo yes ; else echo no ; fi)
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ifeq ($(GOLANG),yes)
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GOROOT ?= $(shell $(GO) env GOROOT)
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GOCGO ?= $(shell if [ "$(shell $(GO) env CGO_ENABLED)" = 1 ]; then echo yes ; else echo no ; fi)
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GOOSARCH ?= $(shell $(GO) env GOHOSTOS)_$(shell $(GO) env GOHOSTARCH)
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CGO_REQUIRED=$(shell $(topdir)/go/cgo-required.sh $(GO))
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ifeq ($(CGO_REQUIRED),1)
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# Strictly speaking go1.15 doesn't need this, but 1.16 is when the
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# real golang support arrives for non-cgo support, so drop the last
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# vestige of legacy workarounds then.
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CGO_LDFLAGS_ALLOW := -Wl,-?-wrap[=,][^-.@][^,]*
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endif
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CGO_CFLAGS := -I$(topdir)/libcap/include
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CGO_LDFLAGS := -L$(topdir)/libcap
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endif
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endif
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# If you want capsh to launch with something other than /bin/bash
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# build like this:
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#
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# make CAPSH_SHELL='-DSHELL=\"/bin/sh\"'
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#
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# or undefine the following:
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#CAPSH_SHELL := '-DSHELL="/bin/sh"'
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# When installing setcap, you can arrange for the installation process
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# to set its inheritable bit to be able to place capabilities on files.
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# It can be used in conjunction with pam_cap (associated with su and
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# certain users say) to make it useful for specially blessed users.
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#
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# make RAISE_SETFCAP=yes install
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#
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# This is now defaulted to no because some distributions have started
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# shipping with all users blessed with full inheritable sets which makes
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# no sense whatsoever!
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#
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# Indeed, it looks alarmingly like these distributions are recreating
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# the environment for what became known as the sendmail-capabilities
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# bug from 2000:
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#
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# https://sites.google.com/site/fullycapable/Home/thesendmailcapabilitiesissue
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#
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# they are also nullifying the difference between a p-bit and an i-bit.
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#
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# Folk really should read this document, which explains there is a really
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# important difference being lost here:
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#
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# https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/33528.pdf
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#
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# In the context of this tree, on such such systems, a yes setting will
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# guarantee that every user, by default, is able to bless any binary with
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# any capability - a ready made local exploit machanism.
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RAISE_SETFCAP := no
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# If set to yes, this will cause the go "web" demo app to force the needed p
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# bit to be able to bind to port 80 without running as root.
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RAISE_GO_FILECAP := no
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# Global cleanup stuff
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LOCALCLEAN=rm -f *~ core
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DISTCLEAN=@find . \( -name '*.orig' -o -name '*.rej' \) | xargs rm -f
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