[PATCH v5 2/4] erofs-utils: introduce extra build dependencies for S3 support
Gao Xiang
hsiangkao at linux.alibaba.com
Thu Aug 7 00:36:12 AEST 2025
From: Yifan Zhao <zhaoyifan28 at huawei.com>
This patch adds additional dependencies on libcurl, openssl and libxml2
library for the upcoming S3 data source support, with libcurl to
interact with S3 API, openssl to generate S3 auth signature and libxml2
to parse response body.
erofs-utils: introduce extra build dependencies for S3 support
This patch adds additional dependencies on libcurl, openssl, and libxml2
for the upcoming S3 data source support:
- libcurl is used to interact with the S3 API;
- openssl is used to generate S3 authentication signatures;
- libxml2 is used to parse response bodies;
These dependencies are optional and controlled using the
`--with-{libcurl,openssl,libxml2}` configure options.
Additionally, a new `--enable-s3` option is introduced to enable S3
support. It will report an error if any of the three required libraries
doesn't work properly.
Signed-off-by: Yifan Zhao <zhaoyifan28 at huawei.com>
Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>
---
configure.ac | 129 ++++++++++++++++++++++++++++++++++++++++++++++-
lib/Makefile.am | 1 +
mkfs/Makefile.am | 3 +-
3 files changed, 131 insertions(+), 2 deletions(-)
diff --git a/configure.ac b/configure.ac
index da6ae48..7769ac9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,7 @@ esac
# OS-specific treatment
AM_CONDITIONAL([OS_LINUX], [test "$build_linux" = "yes"])
-AM_INIT_AUTOMAKE([foreign -Wall])
+AM_INIT_AUTOMAKE([foreign subdir-objects -Wall])
# Checks for programs.
AM_PROG_AR
@@ -165,6 +165,22 @@ AC_ARG_WITH(xxhash,
[AS_HELP_STRING([--with-xxhash],
[Enable and build with libxxhash support @<:@default=auto@:>@])])
+AC_ARG_WITH(libcurl,
+ [AS_HELP_STRING([--with-libcurl],
+ [Enable and build with libcurl support @<:@default=auto@:>@])])
+
+AC_ARG_WITH(openssl,
+ [AS_HELP_STRING([--with-openssl],
+ [Enable and build with openssl support @<:@default=auto@:>@])])
+
+AC_ARG_WITH(libxml2,
+ [AS_HELP_STRING([--with-libxml2],
+ [Enable and build with libxml2 support @<:@default=auto@:>@])])
+
+AC_ARG_ENABLE(s3,
+ [AS_HELP_STRING([--enable-s3], [enable s3 image generation support @<:@default=no@:>@])],
+ [enable_s3="$enableval"], [enable_s3="no"])
+
AC_ARG_ENABLE(fuse,
[AS_HELP_STRING([--enable-fuse], [enable erofsfuse @<:@default=no@:>@])],
[enable_fuse="$enableval"], [enable_fuse="no"])
@@ -583,6 +599,91 @@ AS_IF([test "x$with_xxhash" != "xno"], [
])
])
+# Configure libcurl
+have_libcurl="no"
+AS_IF([test "x$with_libcurl" != "xno"], [
+ PKG_CHECK_MODULES([libcurl], [libcurl], [
+ # Paranoia: don't trust the result reported by pkgconfig before trying out
+ saved_LIBS="$LIBS"
+ saved_CPPFLAGS=${CPPFLAGS}
+ CPPFLAGS="${libcurl_CFLAGS} ${CPPFLAGS}"
+ LIBS="${libcurl_LIBS} $LIBS"
+ AC_CHECK_HEADERS([curl/curl.h],[
+ AC_CHECK_LIB(curl, curl_easy_perform, [], [
+ AC_MSG_ERROR([libcurl doesn't work properly])])
+ AC_CHECK_DECL(curl_easy_perform, [have_libcurl="yes"],
+ [AC_MSG_ERROR([libcurl doesn't work properly])], [[
+#include <curl/curl.h>
+ ]])
+ ])
+ LIBS="${saved_LIBS}"
+ CPPFLAGS="${saved_CPPFLAGS}"], [
+ AS_IF([test "x$with_libcurl" = "xyes"], [
+ AC_MSG_ERROR([Cannot find proper libcurl])
+ ])
+ ])
+])
+
+# Configure openssl
+have_openssl="no"
+AS_IF([test "x$with_openssl" != "xno"], [
+ PKG_CHECK_MODULES([openssl], [openssl], [
+ # Paranoia: don't trust the result reported by pkgconfig before trying out
+ saved_LIBS="$LIBS"
+ saved_CPPFLAGS=${CPPFLAGS}
+ CPPFLAGS="${openssl_CFLAGS} ${CPPFLAGS}"
+ LIBS="${openssl_LIBS} $LIBS"
+ AC_CHECK_HEADERS([openssl/hmac.h],[
+ AC_CHECK_LIB(ssl, EVP_sha1, [], [
+ AC_MSG_ERROR([openssl doesn't work properly])])
+ AC_CHECK_DECL(EVP_sha1, [have_openssl="yes"],
+ [AC_MSG_ERROR([openssl doesn't work properly])], [[
+#include <openssl/hmac.h>
+ ]])
+ ])
+ LIBS="${saved_LIBS}"
+ CPPFLAGS="${saved_CPPFLAGS}"], [
+ AS_IF([test "x$with_openssl" = "xyes"], [
+ AC_MSG_ERROR([Cannot find proper openssl])
+ ])
+ ])
+])
+
+# Configure libxml2
+have_libxml2="no"
+AS_IF([test "x$with_libxml2" != "xno"], [
+ PKG_CHECK_MODULES([libxml2], [libxml-2.0], [
+ # Paranoia: don't trust the result reported by pkgconfig before trying out
+ saved_LIBS="$LIBS"
+ saved_CPPFLAGS=${CPPFLAGS}
+ CPPFLAGS="${libxml2_CFLAGS} ${CPPFLAGS}"
+ LIBS="${libxml2_LIBS} $LIBS"
+ AC_CHECK_HEADERS([libxml/parser.h],[
+ AC_CHECK_LIB(xml2, xmlReadMemory, [], [
+ AC_MSG_ERROR([libxml2 doesn't work properly])])
+ AC_CHECK_DECL(xmlReadMemory, [have_libxml2="yes"],
+ [AC_MSG_ERROR([libxml2 doesn't work properly])], [[
+#include <libxml/parser.h>
+ ]])
+ ])
+ LIBS="${saved_LIBS}"
+ CPPFLAGS="${saved_CPPFLAGS}"], [
+ AS_IF([test "x$with_libxml2" = "xyes"], [
+ AC_MSG_ERROR([Cannot find proper libxml2])
+ ])
+ ])
+])
+
+AS_IF([test "x$enable_s3" != "xno"], [
+ AS_IF(
+ [test "x$have_libcurl" = "xyes" && \
+ test "x$have_openssl" = "xyes" && \
+ test "x$have_libxml2" = "xyes"],
+ [have_s3="yes"],
+ [have_s3="no"
+ AC_MSG_ERROR([S3 disabled: missing libcurl, openssl, or libxml2])])
+ ], [have_s3="no"])
+
# Enable 64-bit off_t
CFLAGS+=" -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
@@ -606,6 +707,10 @@ AM_CONDITIONAL([ENABLE_LIBDEFLATE], [test "x${have_libdeflate}" = "xyes"])
AM_CONDITIONAL([ENABLE_LIBZSTD], [test "x${have_libzstd}" = "xyes"])
AM_CONDITIONAL([ENABLE_QPL], [test "x${have_qpl}" = "xyes"])
AM_CONDITIONAL([ENABLE_XXHASH], [test "x${have_xxhash}" = "xyes"])
+AM_CONDITIONAL([ENABLE_LIBCURL], [test "x${have_libcurl}" = "xyes"])
+AM_CONDITIONAL([ENABLE_OPENSSL], [test "x${have_openssl}" = "xyes"])
+AM_CONDITIONAL([ENABLE_LIBXML2], [test "x${have_libxml2}" = "xyes"])
+AM_CONDITIONAL([ENABLE_S3], [test "x${have_s3}" = "xyes"])
AM_CONDITIONAL([ENABLE_STATIC_FUSE], [test "x${enable_static_fuse}" = "xyes"])
if test "x$have_uuid" = "xyes"; then
@@ -657,6 +762,28 @@ if test "x$have_xxhash" = "xyes"; then
AC_DEFINE([HAVE_XXHASH], 1, [Define to 1 if xxhash is found])
fi
+if test "x$have_libcurl" = "xyes"; then
+ AC_DEFINE([HAVE_LIBCURL], 1, [Define to 1 if libcurl is found])
+ AC_SUBST([libcurl_LIBS])
+ AC_SUBST([libcurl_CFLAGS])
+fi
+
+if test "x$have_openssl" = "xyes"; then
+ AC_DEFINE([HAVE_OPENSSL], 1, [Define to 1 if openssl is found])
+ AC_SUBST([openssl_LIBS])
+ AC_SUBST([openssl_CFLAGS])
+fi
+
+if test "x$have_libxml2" = "xyes"; then
+ AC_DEFINE([HAVE_LIBXML2], 1, [Define to 1 if libxml2 is found])
+ AC_SUBST([libxml2_LIBS])
+ AC_SUBST([libxml2_CFLAGS])
+fi
+
+if test "x$have_s3" = "xyes"; then
+ AC_DEFINE([S3EROFS_ENABLED], 1, [Define to 1 if s3 is enabled])
+fi
+
# Dump maximum block size
AS_IF([test "x$erofs_cv_max_block_size" = "x"],
[$erofs_cv_max_block_size = 4096], [])
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 0db81df..6458acf 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -66,6 +66,7 @@ liberofs_la_CFLAGS += ${libxxhash_CFLAGS}
else
liberofs_la_SOURCES += xxhash.c
endif
+liberofs_la_CFLAGS += ${libcurl_CFLAGS} ${openssl_CFLAGS} ${libxml2_CFLAGS}
if ENABLE_EROFS_MT
liberofs_la_LDFLAGS = -lpthread
liberofs_la_SOURCES += workqueue.c
diff --git a/mkfs/Makefile.am b/mkfs/Makefile.am
index 2499242..b84b4c1 100644
--- a/mkfs/Makefile.am
+++ b/mkfs/Makefile.am
@@ -7,4 +7,5 @@ mkfs_erofs_SOURCES = main.c
mkfs_erofs_CFLAGS = -Wall -I$(top_srcdir)/include
mkfs_erofs_LDADD = $(top_builddir)/lib/liberofs.la ${libselinux_LIBS} \
${libuuid_LIBS} ${liblz4_LIBS} ${liblzma_LIBS} ${zlib_LIBS} \
- ${libdeflate_LIBS} ${libzstd_LIBS} ${libqpl_LIBS} ${libxxhash_LIBS}
+ ${libdeflate_LIBS} ${libzstd_LIBS} ${libqpl_LIBS} ${libxxhash_LIBS} \
+ ${libcurl_LIBS} ${openssl_LIBS} ${libxml2_LIBS}
--
2.43.5
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