Pass --as-needed to ld instead of doing ldd/patchelf crimes

.build.yml

@@ -3,7 +3,6 @@ packages:
   - clang
   - pkg-config
   - libtss2-dev
-  - patchelf
   - ronn
 tasks:
   - get-zfs: |

Makefile

@@ -63,9 +63,8 @@ $(subst $(MANDIR),$(OUTDIR)man/,$(MANPAGE_SOURCES)) : $(MANDIR)index.txt $(MANPA
 
 $(OUTDIR)%$(EXE) : $(subst $(SRCDIR),$(OBJDIR),$(subst .cpp,$(OBJ),$(SRCDIR)bin/%.cpp $(COMMON_SOURCES)))
 	@mkdir -p $(dir $@)
-	$(CXX) $(CXXAR) -o$@ $^ $(PIC) $(LDAR)
+	$(CXX) $(CXXAR) -o$@ $^ $(PIC) -Wl,--as-needed $(LDAR)
 	$(STRIP) $(STRIPAR) $@
-	$(LDD) --unused $@ | $(AWK) -F/ 'BEGIN {args = ""}  /^\t/ {args = args " --remove-needed " $$NF}  END { if(!args) exit; print "$(PATCHELF)" args " $@"}' | sh -x
 
 $(OBJDIR)%$(OBJ) : $(SRCDIR)%.cpp
 	@mkdir -p $(dir $@)

README.md

@@ -14,7 +14,7 @@ Plus it's a pretty good annoyed sigh onomatopoeia.
 
 ### Building
 
-You'll need `pkg-config`, `patchelf` (or to set `$PATCHELF=true`), `libzfslinux-dev`, `libtss2-dev`<!-- , to initialise the submodules -->, and `make` should hopefully Just Work™ if you have a C++17-capable compiler.
+You'll need `pkg-config`, `libzfslinux-dev`, `libtss2-dev`<!-- , to initialise the submodules -->, and `make` should hopefully Just Work™ if you have a C++17-capable compiler.
 The output binaries are trimmed of extraneous dependencies, so they're all just libc + libzfs and friends + TPM back-end.
 
 ### Installation

configMakefile

@@ -55,7 +55,6 @@ LNCMAKEAR := LDFLAGS="$(LNCXXAR)"
 LDD ?= ldd
 AWK ?= awk
 RONN ?= ronn
-PATCHELF ?= patchelf
 OBJ := .o
 CXXAR := -g -O3 -std=c++17 -fno-exceptions -Wall -Wextra $(CXXSPECIFIC) -pipe $(INCCXXAR) $(PIC)
 STRIP ?= @echo strip