lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20190830005037.24004-8-ivan.khoronzhuk@linaro.org>
Date:   Fri, 30 Aug 2019 03:50:34 +0300
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     linux@...linux.org.uk, ast@...nel.org, daniel@...earbox.net,
        yhs@...com, davem@...emloft.net, jakub.kicinski@...ronome.com,
        hawk@...nel.org, john.fastabend@...il.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Subject: [PATCH RFC bpf-next 07/10] samples: bpf: add makefile.prog for separate CC build

The HOSTCC is supposed to build binaries and tools running on the host
afterwards, in order to simplify build or so, like "fixdep" or else.
In case of cross compiling "fixdep" is executed on host when the rest
samples should run on target arch. In order to build binaries for
target arch with CC and tools running on host with HOSTCC, lets add
Makefile.prog for simplicity, having definition and routines similar
to ones, used in script/Makefile.host. That allows later add
cross-compilation to samples/bpf with minimum changes.

Makefile.prog contains only stuff needed for samples/bpf, potentially
can be reused and sophisticated for other prog sets later and now
needed only for unblocking tricky samples/bpf cross compilation.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
---
 samples/bpf/Makefile.prog | 77 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 samples/bpf/Makefile.prog

diff --git a/samples/bpf/Makefile.prog b/samples/bpf/Makefile.prog
new file mode 100644
index 000000000000..d5d02fbb5e6e
--- /dev/null
+++ b/samples/bpf/Makefile.prog
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0
+# ==========================================================================
+# Building binaries on the host system
+# Binaries are not used during the compilation of the kernel, and intendent to
+# be build for target board, target board can be host ofc. Added to build
+# binaries to run not on host system.
+#
+# Both C and C++ are supported, but preferred language is C for such utilities.
+#
+# Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
+# progs-y := xdpsock_example
+# Will compile xdpsock_example.c and create an executable named xdpsock_example
+#
+# progs-y    := xdpsock
+# xdpsock-objs := xdpsock_user.o xdpsock_user2.o
+# Will compile xdpsock.c and xdpsock.c, and then link the executable
+# xdpsock, based on xdpsock_user.o and xdpsock_user2.o
+#
+# Inherited from scripts/Makefile.host
+#
+__progs := $(sort $(progs-y))
+
+# C code
+# Executables compiled from a single .c file
+prog-csingle	:= $(foreach m,$(__progs), \
+			$(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
+
+# C executables linked based on several .o files
+prog-cmulti	:= $(foreach m,$(__progs),\
+		   $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
+
+# Object (.o) files compiled from .c files
+prog-cobjs	:= $(sort $(foreach m,$(__progs),$($(m)-objs)))
+
+prog-csingle	:= $(addprefix $(obj)/,$(prog-csingle))
+prog-cmulti	:= $(addprefix $(obj)/,$(prog-cmulti))
+prog-cobjs	:= $(addprefix $(obj)/,$(prog-cobjs))
+
+#####
+# Handle options to gcc. Support building with separate output directory
+
+_progc_flags   = $(PROGS_CFLAGS) \
+                 $(PROGCFLAGS_$(basetarget).o)
+
+# $(objtree)/$(obj) for including generated headers from checkin source files
+ifeq ($(KBUILD_EXTMOD),)
+ifdef building_out_of_srctree
+_progc_flags   += -I $(objtree)/$(obj)
+endif
+endif
+
+progc_flags    = -Wp,-MD,$(depfile) $(_progc_flags)
+
+# Create executable from a single .c file
+# prog-csingle -> Executable
+quiet_cmd_prog-csingle 	= CC  $@
+      cmd_prog-csingle	= $(CC) $(progc_flags) $(PROGS_LDFLAGS) -o $@ $< \
+		$(PROGS_LDLIBS) $(PROGLDLIBS_$(@F))
+$(prog-csingle): $(obj)/%: $(src)/%.c FORCE
+	$(call if_changed_dep,prog-csingle)
+
+# Link an executable based on list of .o files, all plain c
+# prog-cmulti -> executable
+quiet_cmd_prog-cmulti	= LD  $@
+      cmd_prog-cmulti	= $(CC) $(progc_flags) $(PROGS_LDFLAGS) -o $@ \
+			  $(addprefix $(obj)/,$($(@F)-objs)) \
+			  $(PROGS_LDLIBS) $(PROGLDLIBS_$(@F))
+$(prog-cmulti): $(prog-cobjs) FORCE
+	$(call if_changed,prog-cmulti)
+$(call multi_depend, $(prog-cmulti), , -objs)
+
+# Create .o file from a single .c file
+# prog-cobjs -> .o
+quiet_cmd_prog-cobjs	= CC  $@
+      cmd_prog-cobjs	= $(CC) $(progc_flags) -c -o $@ $<
+$(prog-cobjs): $(obj)/%.o: $(src)/%.c FORCE
+	$(call if_changed_dep,prog-cobjs)
-- 
2.17.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ