base-filesystem: Support Arch-style multilib

On distros like Arch and on carbonOS, libraries end up in /usr/lib.
Thus, /lib64 should point to /usr/lib. This commit adds this
functionality as a final fallback (if neither Debian-style nor
Fedora-style multilib can be detected)

diff --git a/src/shared/base-filesystem.c b/src/shared/base-filesystem.c
index be6dd1654a0d6ed6ec23f6dd80d29cf024f14002..5890f30383a9a04eb5e4bb66eb3018cbc0f9b31c 100644 (file)
--- a/src/shared/base-filesystem.c
+++ b/src/shared/base-filesystem.c
@@ -45,13 +45,14 @@ static const BaseFilesystem table[] = {
          * been mounted into) it is thus necessary to create a symlink pointing to the right subdirectory of
          * /usr/ first — otherwise we couldn't invoke any dynamic binary. Let's detect this case here, and
          * create the symlink as needed should it be missing. We prefer doing this consistently with Debian's
-         * multiarch logic, but support Fedora-style multilib too. */
+         * multiarch logic, but support Fedora-style and Arch-style multilib too. */
 #if defined(__aarch64__)
         /* aarch64 ELF ABI actually says dynamic loader is in /lib/, but Fedora puts it in /lib64/ anyway and
          * just symlinks /lib/ld-linux-aarch64.so.1 to ../lib64/ld-linux-aarch64.so.1. For this to work
          * correctly, /lib64/ must be symlinked to /usr/lib64/. */
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-aarch64.so.1" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-linux-aarch64.so.1" },
 #  define KNOW_LIB64_DIRS 1
 #elif defined(__alpha__)
 #elif defined(__arc__) || defined(__tilegx__)
@@ -60,20 +61,24 @@ static const BaseFilesystem table[] = {
 #  define KNOW_LIB64_DIRS 1
 #elif defined(__i386__) || defined(__x86_64__)
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-x86-64.so.2" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-linux-x86-64.so.2" },
 #  define KNOW_LIB64_DIRS 1
 #elif defined(__ia64__)
 #elif defined(__loongarch64)
 #  define KNOW_LIB64_DIRS 1
 #  if defined(__loongarch_double_float)
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-loongarch-lp64d.so.1" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-linux-loongarch-lp64d.so.1" },
 #  elif defined(__loongarch_single_float)
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-loongarch-lp64f.so.1" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-linux-loongarch-lp64f.so.1" },
 #  elif defined(__loongarch_soft_float)
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-loongarch-lp64s.so.1" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-linux-loongarch-lp64s.so.1" },
 #  else
 #    error "Unknown LoongArch ABI"
 #  endif
@@ -90,7 +95,8 @@ static const BaseFilesystem table[] = {
 #elif defined(__powerpc__)
 #  if defined(__PPC64__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld64.so.2" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld64.so.2" },
 #    define KNOW_LIB64_DIRS 1
 #  elif defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
         /* powerpc64-linux-gnu */
@@ -102,7 +108,8 @@ static const BaseFilesystem table[] = {
 #  elif __riscv_xlen == 64
         /* Same situation as for aarch64 */
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-linux-riscv64-lp64d.so.1" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-linux-riscv64-lp64d.so.1" },
 #    define KNOW_LIB64_DIRS 1
 #  else
 #    error "Unknown RISC-V ABI"
@@ -111,7 +118,8 @@ static const BaseFilesystem table[] = {
         /* s390-linux-gnu */
 #elif defined(__s390x__)
         { "lib64",    0, "usr/lib/"LIB_ARCH_TUPLE"\0"
-                         "usr/lib64\0",                "ld-lsb-s390x.so.3" },
+                         "usr/lib64\0"
+                         "usr/lib\0",                "ld-lsb-s390x.so.3" },
 #    define KNOW_LIB64_DIRS 1
 #elif defined(__sparc__)
 #endif