Re: [fsverity-utils PATCH v4 2/2] Allow to build and run sign/digest on Windows

[Luca Boccassi <luca.boccassi@gmail.com>]

On Mon, 21 Dec 2020 at 21:40, Eric Biggers <ebiggers@kernel.org> wrote:
>
> On Thu, Dec 17, 2020 at 07:25:16PM +0000, luca.boccassi@gmail.com wrote:
> > From: Luca Boccassi <luca.boccassi@microsoft.com>
> >
> > Add some minimal compat type defs, and stub out the enable/measure
> > sources. Also add a way to handle the fact that mingw adds a
> > .exe extension automatically in the Makefile install rules, and
> > that there is not pkg-config and the libcrypto linker flag is
> > different.
> >
> > Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
>
> This commit message is outdated; can you update it?

Fixed in v5.

> > diff --git a/Makefile b/Makefile
> > index bfe83c4..a5aa900 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -35,6 +35,11 @@
> >  cc-option = $(shell if $(CC) $(1) -c -x c /dev/null -o /dev/null > /dev/null 2>&1; \
> >             then echo $(1); fi)
> >
> > +# Support building with MinGW for minimal Windows fsverity.exe
> > +ifneq ($(findstring -mingw,$(shell $(CC) -dumpmachine 2>/dev/null)),)
> > +MINGW = 1
> > +endif
> > +
> >  CFLAGS ?= -O2
> >
> >  override CFLAGS := -Wall -Wundef                             \
> > @@ -47,7 +52,7 @@ override CFLAGS := -Wall -Wundef                            \
> >       $(call cc-option,-Wvla)                                 \
> >       $(CFLAGS)
> >
> > -override CPPFLAGS := -Iinclude -D_FILE_OFFSET_BITS=64 $(CPPFLAGS)
> > +override CPPFLAGS := -Iinclude -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE $(CPPFLAGS)
> >
> >  ifneq ($(V),1)
> >  QUIET_CC        = @echo '  CC      ' $@;
> > @@ -62,7 +67,12 @@ BINDIR          ?= $(PREFIX)/bin
> >  INCDIR          ?= $(PREFIX)/include
> >  LIBDIR          ?= $(PREFIX)/lib
> >  DESTDIR         ?=
> > +ifneq ($(MINGW),1)
> >  PKGCONF         ?= pkg-config
> > +else
> > +PKGCONF         := false
> > +EXEEXT          := .exe
> > +endif
> >
> >  # Rebuild if a user-specified setting that affects the build changed.
> >  .build-config: FORCE
> > @@ -87,9 +97,9 @@ CFLAGS          += $(shell "$(PKGCONF)" libcrypto --cflags 2>/dev/null || echo)
> >  # If we are dynamically linking, when running tests we need to override
> >  # LD_LIBRARY_PATH as no RPATH is set
> >  ifdef USE_SHARED_LIB
> > -RUN_FSVERITY    = LD_LIBRARY_PATH=./ ./fsverity
> > +RUN_FSVERITY    = LD_LIBRARY_PATH=./ ./fsverity$(EXEEXT)
> >  else
> > -RUN_FSVERITY    = ./fsverity
> > +RUN_FSVERITY    = ./fsverity$(EXEEXT)
> >  endif
> >
> >  ##############################################################################
> > @@ -99,6 +109,9 @@ endif
> >  SOVERSION       := 0
> >  LIB_CFLAGS      := $(CFLAGS) -fvisibility=hidden
> >  LIB_SRC         := $(wildcard lib/*.c)
> > +ifeq ($(MINGW),1)
> > +LIB_SRC         := $(filter-out lib/enable.c,${LIB_SRC})
> > +endif
> >  LIB_HEADERS     := $(wildcard lib/*.h) $(COMMON_HEADERS)
> >  STATIC_LIB_OBJ  := $(LIB_SRC:.c=.o)
> >  SHARED_LIB_OBJ  := $(LIB_SRC:.c=.shlib.o)
> > @@ -141,10 +154,13 @@ PROG_COMMON_SRC   := programs/utils.c
> >  PROG_COMMON_OBJ   := $(PROG_COMMON_SRC:.c=.o)
> >  FSVERITY_PROG_OBJ := $(PROG_COMMON_OBJ)              \
> >                    programs/cmd_digest.o      \
> > -                  programs/cmd_enable.o      \
> > -                  programs/cmd_measure.o     \
> >                    programs/cmd_sign.o        \
> >                    programs/fsverity.o
> > +ifneq ($(MINGW),1)
> > +FSVERITY_PROG_OBJ += \
> > +                  programs/cmd_enable.o      \
> > +                  programs/cmd_measure.o
> > +endif
> >  TEST_PROG_SRC     := $(wildcard programs/test_*.c)
> >  TEST_PROGRAMS     := $(TEST_PROG_SRC:programs/%.c=%)
> >
>
> The Makefile target to build the binary is still "fsverity", but for Windows it
> actually builds "fsverity.exe".  I think that when the .exe extension is added,
> the name of the Makefile target should change too.  Makefile targets should be
> either a filename target *or* a special target, not conditionally either one.

Ok, updated in v5.

> > @@ -186,7 +202,7 @@ test_programs:$(TEST_PROGRAMS)
> >  # want to run the full tests.
> >  check:fsverity test_programs
> >       for prog in $(TEST_PROGRAMS); do \
> > -             $(TEST_WRAPPER_PROG) ./$$prog || exit 1; \
> > +             $(TEST_WRAPPER_PROG) ./$$prog$(EXEEXT) || exit 1; \
> >       done
>
> The .exe extension isn't being added to the test programs when they are built.
> Did you intend for building the test programs for Windows (and running them on
> Windows) to be supported?

Yes it probably should. Made further updates, and at least with
mingw/wine make check works.

Kind regards,
Luca Boccassi