guix: build x86_64-linux bitcoind fully statically

-static-pie
Produce a static position independent executable on targets that support it.
A static position independent executable is similar to a static executable,
but can be loaded at any address without a dynamic linker.

See https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html

GCC 12 is needed to avoid issues with std::thread and static linking.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104852

contrib/devtools/symbol-check.py

@@ -54,7 +54,7 @@
 # https://sourceware.org/glibc/wiki/ABIList?action=recall&rev=16
 ELF_INTERPRETER_NAMES: dict[lief.ELF.ARCH, dict[lief.ENDIANNESS, str]] = {
     lief.ELF.ARCH.x86_64:  {
-        lief.ENDIANNESS.LITTLE: "/lib64/ld-linux-x86-64.so.2",
+        lief.ENDIANNESS.LITTLE: "",
     },
     lief.ELF.ARCH.ARM:     {
         lief.ENDIANNESS.LITTLE: "/lib/ld-linux-armhf.so.3",
@@ -214,6 +214,10 @@ def check_exported_symbols(binary) -> bool:
 
 def check_ELF_libraries(binary) -> bool:
     ok: bool = True
+
+    if binary.header.machine_type == lief.ELF.ARCH.x86_64:
+        return len(binary.libraries) == 0
+
     for library in binary.libraries:
         if library not in ELF_ALLOWED_LIBRARIES:
             print(f'{filename}: {library} is not in ALLOWED_LIBRARIES!')

contrib/guix/libexec/build.sh

@@ -155,10 +155,10 @@ esac
 
 # Determine the correct value for -Wl,--dynamic-linker for the current $HOST
 case "$HOST" in
+    x86_64-linux-gnu) ;;
     *linux*)
         glibc_dynamic_linker=$(
             case "$HOST" in
-                x86_64-linux-gnu)      echo /lib64/ld-linux-x86-64.so.2 ;;
                 arm-linux-gnueabihf)   echo /lib/ld-linux-armhf.so.3 ;;
                 aarch64-linux-gnu)     echo /lib/ld-linux-aarch64.so.1 ;;
                 riscv64-linux-gnu)     echo /lib/ld-linux-riscv64-lp64d.so.1 ;;
@@ -243,6 +243,7 @@ esac
 
 # LDFLAGS
 case "$HOST" in
+    x86_64-linux-gnu)  HOST_LDFLAGS="-static-libgcc -static-pie -Wl,-O2" ;; # static-libgcc needed for configure
     *linux*)  HOST_LDFLAGS="-Wl,--as-needed -Wl,--dynamic-linker=$glibc_dynamic_linker -static-libstdc++ -Wl,-O2" ;;
     *mingw*)  HOST_LDFLAGS="-Wl,--no-insert-timestamp" ;;
 esac