freebsd: Support static binaries

Co-Authored-By: Artemis Tosini <me@artem.ist>

pkgs/os-specific/bsd/freebsd/patches/14.1/bsd-lib-mk-force-static.patch

@@ -0,0 +1,81 @@
+From 197b10de54b53a089ad549f2e00787b4fa719210 Mon Sep 17 00:00:00 2001
+From: Artemis Tosini <me@artem.ist>
+Date: Sat, 2 Nov 2024 07:50:13 +0000
+Subject: [PATCH] HACK: bsd.lib.mk: Treat empty SHLIB_NAME as nonexistant
+
+Unsetting SHLIB_NAME in nix package definitions is a pain
+but we can easily set it to be empty. This is useful when
+building static libraries without unneeded static libraries.
+---
+ share/mk/bsd.lib.mk | 14 +++++++-------
+ 1 file changed, 7 insertions(+), 7 deletions(-)
+
+diff --git a/share/mk/bsd.lib.mk b/share/mk/bsd.lib.mk
+index 5f328d5378ca..89d16dc6fa41 100644
+--- a/share/mk/bsd.lib.mk
++++ b/share/mk/bsd.lib.mk
+@@ -242,7 +242,7 @@ PO_FLAG=-pg
+ _LIBDIR:=${LIBDIR}
+ _SHLIBDIR:=${SHLIBDIR}
+ 
+-.if defined(SHLIB_NAME)
++.if defined(SHLIB_NAME) && !empty(SHLIB_NAME)
+ .if ${MK_DEBUG_FILES} != "no"
+ SHLIB_NAME_FULL=${SHLIB_NAME}.full
+ # Use ${DEBUGDIR} for base system debug files, else .debug subdirectory
+@@ -277,7 +277,7 @@ LDFLAGS+=	-Wl,--undefined-version
+ .endif
+ .endif
+ 
+-.if defined(LIB) && !empty(LIB) || defined(SHLIB_NAME)
++.if defined(LIB) && !empty(LIB) || (defined(SHLIB_NAME) && !empty(SHLIB_NAME))
+ OBJS+=		${SRCS:N*.h:${OBJS_SRCS_FILTER:ts:}:S/$/.o/}
+ BCOBJS+=	${SRCS:N*.[hsS]:N*.asm:${OBJS_SRCS_FILTER:ts:}:S/$/.bco/g}
+ LLOBJS+=	${SRCS:N*.[hsS]:N*.asm:${OBJS_SRCS_FILTER:ts:}:S/$/.llo/g}
+@@ -320,14 +320,14 @@ lib${LIB_PRIVATE}${LIB}.ll: ${LLOBJS}
+ CLEANFILES+=	lib${LIB_PRIVATE}${LIB}.bc lib${LIB_PRIVATE}${LIB}.ll
+ .endif
+ 
+-.if defined(SHLIB_NAME) || \
++.if (defined(SHLIB_NAME) && !empty(SHLIB_NAME)) || \
+     defined(INSTALL_PIC_ARCHIVE) && defined(LIB) && !empty(LIB)
+ SOBJS+=		${OBJS:.o=.pico}
+ DEPENDOBJS+=	${SOBJS}
+ CLEANFILES+=	${SOBJS}
+ .endif
+ 
+-.if defined(SHLIB_NAME)
++.if defined(SHLIB_NAME) && !empty(SHLIB_NAME)
+ _LIBS+=		${SHLIB_NAME}
+ 
+ SOLINKOPTS+=	-shared -Wl,-x
+@@ -435,7 +435,7 @@ all: all-man
+ CLEANFILES+=	${_LIBS}
+ 
+ _EXTRADEPEND:
+-.if !defined(NO_EXTRADEPEND) && defined(SHLIB_NAME)
++.if !defined(NO_EXTRADEPEND) && defined(SHLIB_NAME) && !empty(SHLIB_NAME)
+ .if defined(DPADD) && !empty(DPADD)
+ 	echo ${SHLIB_NAME_FULL}: ${DPADD} >> ${DEPENDFILE}
+ .endif
+@@ -501,7 +501,7 @@ _libinstall:
+ 	    ${_INSTALLFLAGS} lib${LIB_PRIVATE}${LIB}_p.a ${DESTDIR}${_LIBDIR}/
+ .endif
+ .endif
+-.if defined(SHLIB_NAME)
++.if defined(SHLIB_NAME) && !empty(SHLIB_NAME)
+ 	${INSTALL} ${TAG_ARGS} ${STRIP} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \
+ 	    ${_INSTALLFLAGS} ${_SHLINSTALLFLAGS} \
+ 	    ${SHLIB_NAME} ${DESTDIR}${_SHLIBDIR}/
+@@ -588,7 +588,7 @@ OBJS_DEPEND_GUESS+= ${SRCS:M*.h}
+ OBJS_DEPEND_GUESS.${_S:${OBJS_SRCS_FILTER:ts:}}.po+=	${_S}
+ .endfor
+ .endif
+-.if defined(SHLIB_NAME) || \
++.if (defined(SHLIB_NAME) && !empty(SHLIB_NAME)) || \
+     defined(INSTALL_PIC_ARCHIVE) && defined(LIB) && !empty(LIB)
+ .for _S in ${SRCS:N*.[hly]}
+ OBJS_DEPEND_GUESS.${_S:${OBJS_SRCS_FILTER:ts:}}.pico+=	${_S}
+-- 
+2.46.1
+

pkgs/os-specific/bsd/freebsd/pkgs/libc/package.nix

@@ -116,6 +116,13 @@ mkDerivation {
         --replace '/usr/share/i18n' '${builtins.placeholder "out"}/share/i18n'
   '';
 
+  # NIX_CFLAGS_LINK is empty at this point except when building static,
+  # in which case the stdenv adapter adds the `-static` flag.
+  # Building with `-static` set causes linker errors.
+  postConfigure = ''
+    export NIX_CFLAGS_LINK=
+  '';
+
   nativeBuildInputs = [
     bsdSetupHook
     freebsdSetupHook
@@ -194,7 +201,7 @@ mkDerivation {
       make -C $BSDSRCDIR/lib/libgcc_eh $makeFlags
       make -C $BSDSRCDIR/lib/libgcc_eh $makeFlags install
 
-      ln -s $BSDSRCDIR/lib/libc/libc.so.7 $BSDSRCDIR/lib/libc/libc.so  # not sure
+      ln -s $BSDSRCDIR/lib/libc/libc.so.7 $BSDSRCDIR/lib/libc/libc.so  # otherwise these dynamic libraries try to link with libc.a
       mkdir $BSDSRCDIR/lib/libgcc_s/i386 $BSDSRCDIR/lib/libgcc_s/cpu_model
       make -C $BSDSRCDIR/lib/libgcc_s $makeFlags
       make -C $BSDSRCDIR/lib/libgcc_s $makeFlags install
@@ -266,6 +273,13 @@ mkDerivation {
       make -C $BSDSRCDIR/libexec/rtld-elf $makeFlags install
       rm -f $out/libexec/ld-elf.so.1
       mv $out/bin/ld-elf.so.1 $out/libexec
+    ''
+    + lib.optionalString (!stdenv.hostPlatform.isStatic) ''
+      mkdir $out/lib/keep_static
+      mv $out/lib/*_nonshared.a $out/lib/libgcc*.a $out/lib/libcompiler_rt.a $out/lib/keep_static
+      rm $out/lib/*.a
+      mv $out/lib/keep_static/* $out/lib
+      rmdir $out/lib/keep_static
     '';
 
   # libc should not be allowed to refer to anything other than itself

pkgs/os-specific/bsd/freebsd/pkgs/libcxxrt.nix

@@ -1,4 +1,8 @@
-{ mkDerivation }:
+{
+  mkDerivation,
+  stdenv,
+  lib,
+}:
 # this package is quite different from stock libcxxrt.
 # as of FreeBSD 14.0, it is vendored from APPROXIMATELY libcxxrt
 # 5d8a15823a103bbc27f1bfdcf2b5aa008fab57dd, though the vendoring mechanism is
@@ -8,11 +12,14 @@ mkDerivation {
   pname = "libcxxrt";
   path = "lib/libcxxrt";
   extraPaths = [ "contrib/libcxxrt" ];
-  outputs = [
-    "out"
-    "dev"
-    "debug"
-  ];
+  outputs =
+    [
+      "out"
+      "dev"
+    ]
+    ++ lib.optionals (!stdenv.hostPlatform.isStatic) [
+      "debug"
+    ];
   noLibcxx = true;
   libName = "cxxrt";
 }

pkgs/os-specific/bsd/freebsd/pkgs/mkDerivation.nix

@@ -58,9 +58,12 @@ lib.makeOverridable (
 
       HOST_SH = stdenv'.shell;
 
-      makeFlags = [
-        "STRIP=-s" # flag to install, not command
-      ] ++ lib.optional (!stdenv'.hostPlatform.isFreeBSD) "MK_WERROR=no";
+      makeFlags =
+        [
+          "STRIP=-s" # flag to install, not command
+        ]
+        ++ lib.optional (!stdenv'.hostPlatform.isFreeBSD) "MK_WERROR=no"
+        ++ lib.optional stdenv.hostPlatform.isStatic "SHLIB_NAME=";
 
       # amd64 not x86_64 for this on unlike NetBSD
       MACHINE_ARCH = freebsd-lib.mkBsdArch stdenv';