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vlibc/Makefile.am
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Makefile
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# vlibc — top-level build (see building/C.md and layouts/C.md).
SUBDIRS = benchmarks
# Build-dir include FIRST: configure generates include/vlibc/features.h
# (from the .in template) into the BUILD tree, and a VPATH build must find
# the generated header before the source tree's checked-in headers.
AM_CPPFLAGS = -I$(top_builddir)/include -I$(top_srcdir)/include
AM_CFLAGS = @VLIBC_CFLAGS@
# ---- Library -------------------------------------------------------------
# Authoritative source-dir inventory (todo 6). Every directory a later plan
# todo creates is enumerated here ONCE, so no area can be forgotten; each is
# appended to libvlibc_la_SOURCES WHEN ITS TODO LANDS — the list grows
# incrementally and never references a directory that does not exist yet:
#
# W1 (wired now): src/internal, src/start, src/errno,
# src/setjmp/x86_64, src/string, crt/ (crt1.o)
# todo 7 src/malloc todo 39-42 src/math todo 50 src/multibyte
# todo 11-14 src/stdlib todo 43 src/complex todo 53-54 src/regex
# todo 15-18 src/stdio todo 9,51 src/ctype todo 57-58 src/network
# todo 19,38 src/unistd todo 55 src/search todo 59 src/mq
# todo 20,23,56 src/process todo 66 src/crypt todo 60 src/aio
# todo 21 src/fcntl todo 44-48 src/thread todo 61 src/ipc
# todo 22,34 src/stat todo 49,52 src/locale todo 62-63 src/ldso
# todo 24 src/dirent todo 42 src/fenv/x86_64
# todo 25 src/select
# todo 26-27 src/time
# todo 28 src/signal
# todo 29 src/termios
# todo 30 src/uio
# todo 31 src/resource
# todo 32,36,54,61,67 src/misc
# todo 33 src/mman
# todo 35 src/sys
# todo 37 src/passwd
# todo 37 src/group
#
# NOTE: crt/x86_64/crt1.s is NOT a library source — it is assembled into the
# standalone crt1.o below (the sole crt owner; todo 64 reuses, never rebuilds).
# Level-independent L1 core (wired today + the pre-plan string slice).
VLIBC_CORE_SRCS = \
src/vlibc.c \
src/internal/assert_fail.c \
src/internal/errno.c \
src/internal/syscall_ret.c \
src/start/libc_start_main.c \
src/start/exit.c \
src/start/environ.c \
src/start/tls.c \
src/errno/strerror.c \
src/setjmp/x86_64/setjmp.s \
src/setjmp/x86_64/longjmp.s \
src/setjmp/x86_64/sigsetjmp.s \
src/setjmp/x86_64/siglongjmp.s \
src/string/strlen.c \
src/string/strcmp.c \
src/string/memcpy.c \
src/string/memmove.c \
src/string/memset.c
# Profile-gated sources, EXISTING gates preserved (strlcpy/strlcat stay L2
# BSD, strcasestr stays L3 GNU — NOT promoted).
VLIBC_LEVEL2_SRCS = src/string/strlcpy.c src/string/strlcat.c
VLIBC_LEVEL3_SRCS = src/string/strcasestr.c
vlibc_lib_LTLIBRARIES = libvlibc.la
libvlibc_la_SOURCES = $(VLIBC_CORE_SRCS)
if PROFILE_GE_2
libvlibc_la_SOURCES += $(VLIBC_LEVEL2_SRCS)
endif
if PROFILE_GE_3
libvlibc_la_SOURCES += $(VLIBC_LEVEL3_SRCS)
endif
libvlibc_la_LDFLAGS = -version-info 0:0:0 -no-undefined
# ---- Public headers ------------------------------------------------------
# The whole public header inventory (the 3 scaffold headers plus todo 5's
# skeleton); the profile-gated generated features.h is installed separately
# below.
vlibc_include_HEADERS = \
include/vlibc.h \
include/stddef.h \
include/string.h \
include/errno.h \
include/setjmp.h \
include/assert.h \
include/cpio.h \
include/float.h \
include/iso646.h \
include/limits.h \
include/stdalign.h \
include/stdarg.h \
include/stdatomic.h \
include/stdbit.h \
include/stdbool.h \
include/stdckdint.h \
include/stdint.h \
include/stdnoreturn.h \
include/tar.h \
include/tgmath.h \
include/threads.h \
include/uchar.h \
include/sys/types.h
# Install location depends on the install method (see configure.ac).
if INSTALL_OVERWRITE
vlibc_includedir = $(includedir)
vlibc_libdir = $(libdir)
else
vlibc_includedir = $(prefix)/lib/vlibc/include
vlibc_libdir = $(prefix)/lib/vlibc/lib
endif
# Generated per-profile feature header (see configure.ac); installed under
# $(vlibc_includedir)/vlibc/. A dedicated primary is used because
# nodist_nobase_vlibc_include_HEADERS is rejected by automake (the "nobase"
# prefix is unsupported for this directory) and loses the vlibc/ path.
vlibc_featuresdir = $(vlibc_includedir)/vlibc
nodist_vlibc_features_HEADERS = include/vlibc/features.h
# ---- Compiler drivers ----------------------------------------------------
bin_SCRIPTS = tools/vlibc-gcc tools/vlibc-clang
# ---- crt objects ---------------------------------------------------------
# crt1.o (from crt/x86_64/crt1.s) is built here and ONLY here: todo 64
# reuses these objects for the shared build and must NOT rebuild them.
# Built by `make all` via all-local so a static vlibc link always has its
# entry object available next to the archive.
crt1.o: crt/x86_64/crt1.s
$(AM_V_GEN)$(CC) $(AM_CPPFLAGS) $(CPPFLAGS) -c -o $@ $<
all-local: crt1.o
# ---- Targets -------------------------------------------------------------
# layouts/C.md requires `make debug`, `make release`, `make bench` and
# `make clean`; build outputs land in bin/{release,debug}.
DEBUG_CFLAGS = -O0 -g3 -DDEBUG
RELEASE_CFLAGS = -O3 -DNDEBUG
debug:
$(MAKE) clean
$(MAKE) all AM_CFLAGS="$(AM_CFLAGS) $(DEBUG_CFLAGS)"
$(MKDIR_P) bin/debug
-cp -P .libs/libvlibc.so* bin/debug/
-cp .libs/libvlibc.a bin/debug/
-cp crt1.o bin/debug/
release:
$(MAKE) clean
$(MAKE) all AM_CFLAGS="$(AM_CFLAGS) $(RELEASE_CFLAGS)"
$(MKDIR_P) bin/release
-cp -P .libs/libvlibc.so* bin/release/
-cp .libs/libvlibc.a bin/release/
-cp crt1.o bin/release/
bench: all
$(MAKE) -C benchmarks bench
# Regenerate compile_commands.json (requires `bear`). Captures both the
# library sources and the on-demand benchmark harness.
compile-commands: clean
bear -- $(MAKE) all
bear --append -- $(MAKE) -C benchmarks bench_vlibc
.PHONY: debug release bench compile-commands
# ---- make check ----------------------------------------------------------
#
# Every test binary is a STATIC VLIBC EXECUTABLE: linked with -nostdlib
# -static -no-pie against crt1.o + a dedicated level-2 test archive. No
# glibc symbol can resolve, so each test genuinely proves self-hosting.
#
# The test archive (libvlibc-check.a) is compiled from the FULL source list
# (all levels included) at VLIBC_LEVEL=2 — the complete L1+L2 surface —
# INDEPENDENT of the configured profile. Rationale: some tests exercise
# L2-gated functions (test_strerror calls strerror_r, future tests call
# bcopy etc.), which a level-1 configured archive does not provide; the
# shipped libvlibc.a keeps the profile gating configured at build time.
# Object files are plain `ar` members compiled directly with $(CC) — no
# libtool (libtool's build-dir libvlibc.a is a wrapper script, and only
# .libs/libvlibc.a is linkable, which is a level-gated profile archive).
#
# Mechanics (extend here for future tests):
# - Add the binary to check_PROGRAMS + TESTS with
# `<bin>_SOURCES = tests/test_x.c`,
# `<bin>_CFLAGS = $(VLIBC_TEST_CFLAGS)` (renames the object to
# `<bin>-<src>.o` automatically),
# `<bin>_LINK = $(VLIBC_TEST_LINK)` and
# `<bin>_LDADD = $(VLIBC_TEST_LDADD)` (static vlibc link; the crt
# object + archive must be in LDADD so they follow the test object).
# - Multi-mode tests run through tests/startup_modes.sh (see that file).
VLIBC_TEST_LEVEL = 2
VLIBC_CHECK_SRCS = $(VLIBC_CORE_SRCS) $(VLIBC_LEVEL2_SRCS) \
$(VLIBC_LEVEL3_SRCS)
VLIBC_CHECK_OBJECTS_FROM_C = $(VLIBC_CHECK_SRCS:.c=.check.o)
VLIBC_CHECK_OBJECTS = $(VLIBC_CHECK_OBJECTS_FROM_C:.s=.check.o)
VLIBC_CHECK_CFLAGS = @VLIBC_CFLAGS@ -DVLIBC_LEVEL=$(VLIBC_TEST_LEVEL) -fno-pic
# The archive itself (plain ar: members compiled at the test level).
libvlibc-check.a: $(VLIBC_CHECK_OBJECTS)
$(AR) $(ARFLAGS) $@ $^
# Library sources compiled at the test level. Deliberately no
# -DHAVE_CONFIG_H and no $(DEFS): config.h pins the PROFILE level, which
# would override -DVLIBC_LEVEL (last definition wins), so the check objects
# must get their level from <vlibc/features.h> alone.
%.check.o: %.c
$(AM_V_CC)$(CC) $(AM_CPPFLAGS) $(CPPFLAGS) $(VLIBC_CHECK_CFLAGS) -c -o $@ $<
%.check.o: %.s
$(AM_V_CCAS)$(CC) $(AM_CPPFLAGS) $(CPPFLAGS) -c -o $@ $<
# Static vlibc link for every check program. automake links
# "$(<bin>_LINK) $(<bin>_OBJECTS) $(<bin>_LDADD) $(LIBS)", so the entry
# object, the level-2 archive and libgcc go in LDADD — they MUST follow the
# test object or the archive would see no undefined symbols and stay
# unextracted. -nostdlib means -lgcc is not auto-added, so it is spelled
# out (permitted libgcc helpers).
VLIBC_TEST_LINK = $(CC) -nostdlib -static -no-pie -o $@
VLIBC_TEST_LDADD = crt1.o libvlibc-check.a -lgcc
# Test TUs: no stack protector (the library is protector-free at this stage),
# non-PIC, level overridden to the test level so L2 declarations are visible.
VLIBC_TEST_CFLAGS = -DVLIBC_LEVEL=$(VLIBC_TEST_LEVEL) -fno-stack-protector \
-fno-pic -fno-pie
check_PROGRAMS = test_syscall test_strerror test_setjmp test_headers \
test_startup
test_syscall_SOURCES = tests/syscall_test.c
test_syscall_CFLAGS = $(VLIBC_TEST_CFLAGS)
test_syscall_DEPENDENCIES = crt1.o libvlibc-check.a
test_syscall_LINK = $(VLIBC_TEST_LINK)
test_syscall_LDADD = $(VLIBC_TEST_LDADD)
test_strerror_SOURCES = tests/test_strerror.c
test_strerror_CFLAGS = $(VLIBC_TEST_CFLAGS)
test_strerror_DEPENDENCIES = crt1.o libvlibc-check.a
test_strerror_LINK = $(VLIBC_TEST_LINK)
test_strerror_LDADD = $(VLIBC_TEST_LDADD)
test_setjmp_SOURCES = tests/test_setjmp.c
test_setjmp_CFLAGS = $(VLIBC_TEST_CFLAGS)
test_setjmp_DEPENDENCIES = crt1.o libvlibc-check.a
test_setjmp_LINK = $(VLIBC_TEST_LINK)
test_setjmp_LDADD = $(VLIBC_TEST_LDADD)
test_headers_SOURCES = tests/test_headers.c
test_headers_CFLAGS = $(VLIBC_TEST_CFLAGS)
test_headers_DEPENDENCIES = crt1.o libvlibc-check.a
test_headers_LINK = $(VLIBC_TEST_LINK)
test_headers_LDADD = $(VLIBC_TEST_LDADD)
test_startup_SOURCES = tests/test_startup.c
test_startup_CFLAGS = $(VLIBC_TEST_CFLAGS)
test_startup_DEPENDENCIES = crt1.o libvlibc-check.a
test_startup_LINK = $(VLIBC_TEST_LINK)
test_startup_LDADD = $(VLIBC_TEST_LDADD)
# test_startup's default mode exits 42 by design, so it is NOT a bare TESTS
# entry; tests/startup_modes.sh runs its full mode matrix and the -f failure
# scenarios of the other four binaries.
TESTS = test_syscall test_strerror test_setjmp test_headers \
tests/startup_modes.sh
CLEANFILES = crt1.o libvlibc-check.a $(VLIBC_CHECK_OBJECTS)
# Distributed but not installed / not otherwise picked up by automake.
# (TESTS scripts are not auto-distributed, so the mode runner is explicit.)
EXTRA_DIST = \
crt/x86_64/crt1.s \
include/vlibc/internal/test.h \
tests/conformance/symbols.list \
tests/startup_modes.sh \
arch/x86_64/syscall_arch.h \
src/internal/atomic.h \
src/internal/errno.h \
src/internal/libc.h \
src/internal/syscall.h \
src/internal/types.h \
src/start/start.h \
src/start/tcb.h
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