prevent LDFLAGS from ending up in pkg-config .pc file

I can’t find much mention of this problem when searching the web,
except for one case in curl where it was fixed in 2009:
curl/curl@4c8adc8

pkgs/giblib/build.textproto

@@ -2,6 +2,8 @@ source: "http://deb.debian.org/debian/pool/main/g/giblib/giblib_1.2.4.orig.tar.g
 hash: "e437756ce3ded019946fb3d979991cda7604bc345dbb1338b17655caff65a3d3"
 version: "1.2.4-8"
 
+cherry_pick: "pc-ldflags.patch"
+
 writable_sourcedir: true
 in_tree_build: true
 

pkgs/giblib/pc-ldflags.patch

@@ -0,0 +1,11 @@
+--- old/giblib.pc.in	2004-09-04 16:40:40.000000000 +0200
++++ new/giblib.pc.in	2020-05-02 11:13:50.450107188 +0200
+@@ -6,6 +6,6 @@
+ Name: giblib
+ Description: wrapper library for imlib2, and other stuff
+ Version: @VERSION@
+-Libs: -L${libdir} -lgiblib @LDFLAGS@ @IMLIB_LIBS@
++Libs: -L${libdir} -lgiblib @IMLIB_LIBS@
+ Cflags: -I${includedir} -I${includedir}/giblib @IMLIB_CFLAGS@
+
+Binary files /dev/null and new/giblib.pc.in~ differ

pkgs/guile/build.textproto

@@ -2,6 +2,8 @@ source: "https://ftp.gnu.org/gnu/guile/guile-2.0.14.tar.xz"
 hash: "e8442566256e1be14e51fc18839cd799b966bc5b16c6a1d7a7c35155a8619d82"
 version: "2.0.14-6"
 
+cherry_pick: "pc-ldflags.patch"
+
 cbuilder: {}
 
 # build dependencies:

pkgs/guile/pc-ldflags.patch

@@ -0,0 +1,12 @@
+--- old/configure	2017-02-13 22:18:15.000000000 +0100
++++ new/configure	2020-05-02 11:57:10.998023956 +0200
+@@ -54946,7 +54946,7 @@
+ done
+
+ GUILE_CFLAGS="$GUILE_CFLAGS $PTHREAD_CFLAGS"
+-GUILE_LIBS="$LDFLAGS $LIBS"
++GUILE_LIBS=" $LIBS"
+
+
+
+Binary files /dev/null and new/configure~ differ

pkgs/ncurses/build.textproto

@@ -8,6 +8,9 @@ extra_file: "panelw.so.ld"
 extra_file: "formw.so.ld"
 extra_file: "menuw.so.ld"
 
+# Prevent our LDFLAGS from ending up in the pkg-config .pc file:
+cherry_pick: "pc-ldflags.patch"
+
 cbuilder: {
   # TODO: enable C++ support?
   extra_configure_flag: "--without-cxx-binding"

pkgs/ncurses/pc-ldflags.patch

@@ -0,0 +1,15 @@
+--- old/misc/gen-pkgconfig.in	2020-05-02 11:08:19.661290907 +0200
++++ new/misc/gen-pkgconfig.in	2020-05-02 11:10:50.262568124 +0200
+@@ -92,6 +92,12 @@
+ 	-Wl,-z,*) # ignore flags used to manipulate shared image
+ 		continue
+ 		;;
++	-Wl,-rpath*) # ignore rpath
++		continue
++		;;
++	-Wl,--dynamic-linker*) # ignore ELF interpreter
++		continue
++		;;
+ 	-L*)
+ 		[ -d ${opt##-L} ] || continue
+ 		case ${opt##-L} in

pkgs/ruby/build.textproto

@@ -5,6 +5,8 @@ pull: {
   releases_url: "https://www.ruby-lang.org/en/downloads/"
 }
 
+cherry_pick: "pc-ldflags.patch"
+
 cbuilder: {}
 
 # build dependencies:

pkgs/ruby/pc-ldflags.patch

@@ -0,0 +1,17 @@
+--- old/template/ruby.pc.in	2020-03-31 12:44:55.000000000 +0200
++++ new/template/ruby.pc.in	2020-05-02 13:24:09.239957802 +0200
+@@ -48,12 +48,11 @@
+ LIBRUBYARG_STATIC=@LIBRUBYARG_STATIC@
+ LIBRUBYARG=@LIBRUBYARG@
+ LIBS=@LIBS@
+-DLDFLAGS=@DLDFLAGS@
+
+ Name: Ruby
+ Description: Object Oriented Script Language
+ Version: ${ruby_version}
+ URL: https://www.ruby-lang.org
+ Cflags: -I${rubyarchhdrdir} -I${rubyhdrdir}
+-Libs: ${DLDFLAGS} ${LIBRUBYARG_SHARED} ${LIBS}
++Libs: ${LIBRUBYARG_SHARED} ${LIBS}
+ Requires:
+Binary files /dev/null and new/template/ruby.pc.in~ differ