Error compiling with musl-libc:
The commit hash 810f8568f44f5863c2350a39f4f5c8d60f762958
introduces the netinet/ether.h header into xtables.h, which causes an error due
to the redefinition of the ethhdr struct, defined in linux/if_ether.h and
netinet/ether.h. This is fixed by the inclusion of -D__UAPI_DEF_ETHHDR=0 in
CFLAGS for musl. Automatically check for this macro, since it is defined
in musl but not in glibc.
Signed-off-by: Joshua Lant joshualant@xxxxxxxxx
---
configure.ac | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index 2293702b..14106a7e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -206,6 +206,27 @@ if test "x$enable_profiling" = "xyes"; then
regular_LDFLAGS+=" -lgcov --coverage"
fi
+AC_MSG_CHECKING([whether the build is using musl-libc])
+enable_musl_build=""
+
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[#include <netinet/if_ether.h>]],
+ [[
+ #if defined(__UAPI_DEF_ETHHDR) && __UAPI_DEF_ETHHDR == 0
+ return 0;
+ #else
+ #error error trying musl...
+ #endif
+ ]]
+ )],
+ [enable_musl_build="yes"],[enable_musl_build="no"]
+)
+AC_MSG_RESULT([${enable_musl_build}])
+
+if test "x$enable_musl_build" = "xyes"; then
+ regular_CFLAGS+=" -D__UAPI_DEF_ETHHDR=0"
+fi
+
define([EXPAND_VARIABLE],
[$2=[$]$1
if test $prefix = 'NONE'; then
@@ -277,7 +298,8 @@ Build parameters:
Installation prefix (--prefix): ${prefix}
Xtables extension directory: ${e_xtlibdir}
Pkg-config directory: ${e_pkgconfigdir}
- Xtables lock file: ${xt_lock_name}"
+ Xtables lock file: ${xt_lock_name}
+ Build against musl-libc: ${enable_musl_build}"
if [[ -n "$ksourcedir" ]]; then
echo " Kernel source directory: ${ksourcedir}"
--
2.34.1
