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607abb818a
kmod/configure.ac
Emil Velikov 607abb818a configure: tweak the module_directory help string 
Drop the somewhat misleading ${prefix}/lib/modules and explicitly
mention what's the default.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
2024-02-02 12:54:04 -06:00

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AC_PREREQ(2.64)
AC_INIT([kmod],
[31],
[linux-modules@vger.kernel.org],
[kmod],
[http://git.kernel.org/?p=utils/kernel/kmod/kmod.git])
AC_CONFIG_SRCDIR([libkmod/libkmod.c])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS(config.h)
AC_CONFIG_AUX_DIR([build-aux])
AC_USE_SYSTEM_EXTENSIONS
AC_SYS_LARGEFILE
AC_PREFIX_DEFAULT([/usr])
AM_MAINTAINER_MODE([enable])
AM_INIT_AUTOMAKE([check-news foreign 1.11 silent-rules tar-pax no-dist-gzip dist-xz subdir-objects color-tests parallel-tests])
AM_SILENT_RULES([yes])
LT_INIT([disable-static pic-only])
AS_IF([test "x$enable_static" = "xyes"], [AC_MSG_ERROR([--enable-static is not supported by kmod])])
AS_IF([test "x$enable_largefile" = "xno"], [AC_MSG_ERROR([--disable-largefile is not supported by kmod])])
module_compressions=""
module_signatures="legacy"
#####################################################################
# Program checks and configurations
#####################################################################
AC_PROG_SED
AC_PROG_MKDIR_P
AC_PROG_LN_S
PKG_PROG_PKG_CONFIG
AC_PATH_PROG([XSLTPROC], [xsltproc])
AC_PROG_CC_C99
#####################################################################
# Function and structure checks
#####################################################################
AC_CHECK_FUNCS_ONCE(__xstat)
AC_CHECK_FUNCS_ONCE([__secure_getenv secure_getenv])
AC_CHECK_FUNCS_ONCE([finit_module])
CC_CHECK_FUNC_BUILTIN([__builtin_clz])
CC_CHECK_FUNC_BUILTIN([__builtin_types_compatible_p])
CC_CHECK_FUNC_BUILTIN([__builtin_uaddl_overflow], [ ], [ ])
CC_CHECK_FUNC_BUILTIN([__builtin_uaddll_overflow], [ ], [ ])
# dietlibc doesn't have st.st_mtim struct member
AC_CHECK_MEMBERS([struct stat.st_mtim], [], [], [#include <sys/stat.h>])
# musl 1.0 and bionic 4.4 don't have strndupa
AC_CHECK_DECLS_ONCE([strndupa])
# RHEL 5 and older do not have be32toh
AC_CHECK_DECLS_ONCE([be32toh])
# Check kernel headers
AC_CHECK_HEADERS_ONCE([linux/module.h])
AC_MSG_CHECKING([whether _Static_assert() is supported])
AC_COMPILE_IFELSE(
[AC_LANG_SOURCE([[_Static_assert(1, "Test");]])],
[AC_DEFINE([HAVE_STATIC_ASSERT], [1], [Define if _Static_assert() is available])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])
AC_MSG_CHECKING([whether _Noreturn is supported])
AC_COMPILE_IFELSE(
[AC_LANG_SOURCE([[#include <stdlib.h>
_Noreturn int foo(void) { exit(0); }]])],
[AC_DEFINE([HAVE_NORETURN], [1], [Define if _Noreturn is available])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])
#####################################################################
# --with-
#####################################################################
AC_ARG_WITH([distconfdir], AS_HELP_STRING([--with-distconfdir=DIR], [directory to search for distribution configuration files]),
[], [with_distconfdir='${prefix}/lib'])
AC_SUBST([distconfdir], [$with_distconfdir])
AC_ARG_WITH([rootlibdir],
AS_HELP_STRING([--with-rootlibdir=DIR], [rootfs directory to install shared libraries]),
[], [with_rootlibdir=$libdir])
AC_SUBST([rootlibdir], [$with_rootlibdir])
# Ideally this would be $prefix/lib/modules but default to /lib/modules for compatibility with earlier versions
AC_ARG_WITH([module_directory],
AS_HELP_STRING([--with-module-directory=DIR], [directory in which to look for kernel modules @<:@default=/lib/modules@:>@]),
[], [with_module_directory=/lib/modules])
AC_SUBST([module_directory], [$with_module_directory])
# Check all directory arguments for consistency.
for ac_var in distconfdir rootlibdir module_directory
do
eval ac_val=\$$ac_var
# Remove trailing slashes.
case $ac_val in
*/ )
ac_val=`expr "X$ac_val" : 'X\(.*@<:@^/@:>@\)' \| "X$ac_val" : 'X\(.*\)'`
eval $ac_var=\$ac_val;;
esac
# Be sure to have absolute directory names.
case $ac_val in
@<:@\\/$@:>@* | ?:@<:@\\/@:>@* ) continue;;
esac
as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
done
AC_ARG_WITH([zstd],
AS_HELP_STRING([--with-zstd], [handle Zstandard-compressed modules @<:@default=disabled@:>@]),
[], [with_zstd=no])
AS_IF([test "x$with_zstd" != "xno"], [
PKG_CHECK_MODULES([libzstd], [libzstd >= 1.4.4], [LIBS="$LIBS $libzstd_LIBS"])
AC_DEFINE([ENABLE_ZSTD], [1], [Enable Zstandard for modules.])
module_compressions="zstd $module_compressions"
], [
AC_MSG_NOTICE([Zstandard support not requested])
])
CC_FEATURE_APPEND([with_features], [with_zstd], [ZSTD])
AC_ARG_WITH([xz],
AS_HELP_STRING([--with-xz], [handle Xz-compressed modules @<:@default=disabled@:>@]),
[], [with_xz=no])
AS_IF([test "x$with_xz" != "xno"], [
PKG_CHECK_MODULES([liblzma], [liblzma >= 4.99], [LIBS="$LIBS $liblzma_LIBS"])
AC_DEFINE([ENABLE_XZ], [1], [Enable Xz for modules.])
module_compressions="xz $module_compressions"
], [
AC_MSG_NOTICE([Xz support not requested])
])
CC_FEATURE_APPEND([with_features], [with_xz], [XZ])
AC_ARG_WITH([zlib],
AS_HELP_STRING([--with-zlib], [handle gzipped modules @<:@default=disabled@:>@]),
[], [with_zlib=no])
AS_IF([test "x$with_zlib" != "xno"], [
PKG_CHECK_MODULES([zlib], [zlib], [LIBS="$LIBS $zlib_LIBS"])
AC_DEFINE([ENABLE_ZLIB], [1], [Enable zlib for modules.])
module_compressions="gzip $module_compressions"
], [
AC_MSG_NOTICE([zlib support not requested])
])
CC_FEATURE_APPEND([with_features], [with_zlib], [ZLIB])
AC_ARG_WITH([openssl],
AS_HELP_STRING([--with-openssl], [handle PKCS7 signatures @<:@default=disabled@:>@]),
[], [with_openssl=no])
AS_IF([test "x$with_openssl" != "xno"], [
PKG_CHECK_MODULES([libcrypto], [libcrypto >= 1.1.0], [LIBS="$LIBS $libcrypto_LIBS"])
AC_DEFINE([ENABLE_OPENSSL], [1], [Enable openssl for modinfo.])
module_signatures="PKCS7 $module_signatures"
], [
AC_MSG_NOTICE([openssl support not requested])
])
CC_FEATURE_APPEND([with_features], [with_openssl], [LIBCRYPTO])
AC_ARG_WITH([bashcompletiondir],
AS_HELP_STRING([--with-bashcompletiondir=DIR], [Bash completions directory]),
[],
[AS_IF([$($PKG_CONFIG --exists bash-completion)], [
with_bashcompletiondir=$($PKG_CONFIG --variable=completionsdir bash-completion)
] , [
with_bashcompletiondir=${datadir}/bash-completion/completions
])])
AC_SUBST([bashcompletiondir], [$with_bashcompletiondir])
#####################################################################
# --enable-
#####################################################################
AC_ARG_ENABLE([experimental],
AS_HELP_STRING([--enable-experimental], [enable experimental tools and features. Do not enable it unless you know what you are doing. @<:@default=disabled@:>@]),
[], enable_experimental=no)
AM_CONDITIONAL([BUILD_EXPERIMENTAL], [test "x$enable_experimental" = "xyes"])
AS_IF([test "x$enable_experimental" = "xyes"], [
AC_DEFINE(ENABLE_EXPERIMENTAL, [1], [Experimental features.])
])
CC_FEATURE_APPEND([with_features], [enable_experimental], [EXPERIMENTAL])
AC_ARG_ENABLE([tools],
AS_HELP_STRING([--disable-tools], [disable building tools that provide same functionality as module-init-tools @<:@default=enabled@:>@]),
[], enable_tools=yes)
AM_CONDITIONAL([BUILD_TOOLS], [test "x$enable_tools" = "xyes"])
AC_ARG_ENABLE([manpages],
AS_HELP_STRING([--disable-manpages], [disable manpages @<:@default=enabled@:>@]),
[], enable_manpages=yes)
AM_CONDITIONAL([BUILD_MANPAGES], [test "x$enable_manpages" = "xyes"])
AC_ARG_ENABLE([test-modules],
AS_HELP_STRING([--disable-test-modules], [disable building test modules during make check: cached modules will be used @<:@default=enabled@:>@]),
[], enable_test_modules=yes)
AM_CONDITIONAL([BUILD_MODULES], [test "x$enable_test_modules" = "xyes"])
AC_ARG_ENABLE([logging],
AS_HELP_STRING([--disable-logging], [disable system logging @<:@default=enabled@:>@]),
[], enable_logging=yes)
AS_IF([test "x$enable_logging" = "xyes"], [
AC_DEFINE(ENABLE_LOGGING, [1], [System logging.])
])
AC_ARG_ENABLE([debug],
AS_HELP_STRING([--enable-debug], [enable debug messages @<:@default=disabled@:>@]),
[], [enable_debug=no])
AS_IF([test "x$enable_debug" = "xyes"], [
AC_DEFINE(ENABLE_DEBUG, [1], [Debug messages.])
])
AC_ARG_ENABLE([coverage],
AS_HELP_STRING([--enable-coverage], [enable test coverage @<:@default=disabled@:>@]),
[], [enable_coverage=no])
AS_IF([test "x$enable_coverage" = "xyes"], [
AC_CHECK_PROG(have_coverage, [lcov], [yes], [no])
AS_IF([test "x$have_coverage" = xno],[
AC_MSG_ERROR([*** lcov support requested but the program was not found])
], [
lcov_version_major="`lcov --version | cut -d ' ' -f 4 | cut -d '.' -f 1`"
lcov_version_minor="`lcov --version | cut -d ' ' -f 4 | cut -d '.' -f 2`"
AS_IF([test "$lcov_version_major" -lt 1 -o "$lcov_version_minor" -lt 10], [
AC_MSG_ERROR([*** lcov version is too old. 1.10 required])
], [
have_coverage=yes
CC_CHECK_FLAGS_APPEND([with_coverage_cflags], [CFLAGS], [\
-fprofile-arcs \
-ftest-coverage])
])
])
])
AM_CONDITIONAL([ENABLE_COVERAGE], [test "x$enable_coverage" = "xyes"])
m4_ifdef([GTK_DOC_CHECK], [
GTK_DOC_CHECK([1.14],[--flavour no-tmpl-flat])
], [
AM_CONDITIONAL([ENABLE_GTK_DOC], false)])
#####################################################################
# Default CFLAGS and LDFLAGS
#####################################################################
CC_CHECK_FLAGS_APPEND(with_cflags, [CFLAGS], [\
-pipe \
-DANOTHER_BRICK_IN_THE \
-Wall \
-W \
-Wextra \
-Wno-inline \
-Wvla \
-Wundef \
-Wformat=2 \
-Wlogical-op \
-Wsign-compare \
-Wformat-security \
-Wmissing-include-dirs \
-Wformat-nonliteral \
-Wold-style-definition \
-Wpointer-arith \
-Winit-self \
-Wdeclaration-after-statement \
-Wfloat-equal \
-Wmissing-prototypes \
-Wstrict-prototypes \
-Wredundant-decls \
-Wmissing-declarations \
-Wmissing-noreturn \
-Wshadow \
-Wendif-labels \
-Wstrict-aliasing=3 \
-Wwrite-strings \
-Wno-long-long \
-Wno-overlength-strings \
-Wno-unused-parameter \
-Wno-missing-field-initializers \
-Wno-unused-result \
-Wnested-externs \
-Wchar-subscripts \
-Wtype-limits \
-Wuninitialized \
-fno-common \
-fdiagnostics-show-option \
-fvisibility=hidden \
-ffunction-sections \
-fdata-sections])
AC_SUBST([OUR_CFLAGS], "$with_cflags $with_coverage_cflags")
CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [ \
-Wl,--as-needed \
-Wl,--no-undefined \
-Wl,--gc-sections])
AC_SUBST([OUR_LDFLAGS], $with_ldflags)
AC_DEFINE_UNQUOTED(KMOD_FEATURES, ["$with_features"], [Features in this build])
#####################################################################
# Generate files from *.in
#####################################################################
AC_SUBST([module_compressions], $module_compressions)
AC_SUBST([module_signatures], $module_signatures)
AC_CONFIG_FILES([
Makefile
man/Makefile
libkmod/docs/Makefile
libkmod/docs/version.xml
libkmod/libkmod.pc
tools/kmod.pc
])
#####################################################################
AC_OUTPUT
AC_MSG_RESULT([
$PACKAGE $VERSION
=======
module_directory: ${module_directory}
prefix: ${prefix}
sysconfdir: ${sysconfdir}
distconfdir: ${distconfdir}
libdir: ${libdir}
rootlibdir: ${rootlibdir}
includedir: ${includedir}
bindir: ${bindir}
Bash completions dir: ${with_bashcompletiondir}
compiler: ${CC}
cflags: ${with_cflags} ${CFLAGS}
ldflags: ${with_ldflags} ${LDFLAGS}
experimental features: ${enable_experimental}
tools: ${enable_tools}
logging: ${enable_logging}
compression: zstd=${with_zstd} xz=${with_xz} zlib=${with_zlib}
debug: ${enable_debug}
coverage: ${enable_coverage}
doc: ${enable_gtk_doc}
man: ${enable_manpages}
test-modules: ${enable_test_modules}
features: ${with_features}
])
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