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Add check program for symver attribute.

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Fixes: #709.
This commit is contained in:
Ondrej Kozina
2022-02-02 11:34:57 +01:00
committed by Milan Broz
parent 43a636d809
commit 7ab7365020
2 changed files with 14 additions and 5 deletions
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11
configure.ac
View File

@@ -554,6 +554,17 @@ if test "x$enable_static_cryptsetup" = "xyes"; then
PKG_CONFIG=$saved_PKG_CONFIG PKG_CONFIG=$saved_PKG_CONFIG
fi fi
dnl Check compiler support for symver function attribute
saved_CFLAGS=$CFLAGS
CFLAGS="-O0 -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
void _test_sym(void);
__attribute__((__symver__("sym@VERSION_4.2"))) void _test_sym(void) {}
]],
[[ _test_sym() ]]
)],[ AC_DEFINE([HAVE_ATTRIBUTE_SYMVER], 1, [Define to 1 to use __attribute__((symver))])])
CFLAGS=$saved_CFLAGS
AC_MSG_CHECKING([for systemd tmpfiles config directory]) AC_MSG_CHECKING([for systemd tmpfiles config directory])
PKG_CHECK_VAR([systemd_tmpfilesdir], [systemd], [tmpfilesdir], [], [systemd_tmpfilesdir=no]) PKG_CHECK_VAR([systemd_tmpfilesdir], [systemd], [tmpfilesdir], [], [systemd_tmpfilesdir=no])
AC_MSG_RESULT([$systemd_tmpfilesdir]) AC_MSG_RESULT([$systemd_tmpfilesdir])

8
lib/libcryptsetup_symver.h
View File

@@ -67,11 +67,9 @@
* under CRYPT_SYMBOL_EXPORT_OLD(int, crypt_func_X, ...) macro * under CRYPT_SYMBOL_EXPORT_OLD(int, crypt_func_X, ...) macro
*/ */
#ifdef __has_attribute #if HAVE_ATTRIBUTE_SYMVER
# if __has_attribute(symver) # define _CRYPT_SYMVER(_local_sym, _public_sym, _ver_str, _maj, _min) \
# define _CRYPT_SYMVER(_local_sym, _public_sym, _ver_str, _maj, _min) \ __attribute__((__symver__(#_public_sym _ver_str #_maj "." #_min)))
__attribute__((__symver__(#_public_sym _ver_str #_maj "." #_min)))
# endif
#endif #endif
#if !defined(_CRYPT_SYMVER) && defined(__GNUC__) #if !defined(_CRYPT_SYMVER) && defined(__GNUC__)