patches adapted from https://git.alpinelinux.org/aports/tree/main/pciutils on
2020-08-29, except for the last one (which was an adaptation from the build
script to prevent a ctags dependency).

--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 # (c) 1998--2013 Martin Mares <mj@ucw.cz>
 
 OPT=-O2
-CFLAGS=$(OPT) -Wall -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes
+CFLAGS=$(OPT) -Wall -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -fPIC
 
 VERSION=3.2.1
 DATE=2013-11-10
--- a/lib/pread.h
+++ b/lib/pread.h
@@ -12,8 +12,8 @@
  *  don't define it.
  */
 
-#if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ > 0
-/* glibc 2.1 or newer -> pread/pwrite supported automatically */
+#if (defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ > 0) || (_POSIX_VERSION >= 200809L)
+ /* glibc 2.1 or newer or posix 2008 -> pread/pwrite supported automatically */
 
 #elif defined(i386) && defined(__GLIBC__)
 /* glibc 2.0 on i386 -> call syscalls directly */
--- a/Makefile	2020-05-30 22:17:26.000000000 +0000
+++ b/Makefile	2020-08-29 16:45:39.020000000 +0000
@@ -103,7 +103,7 @@
 
 ctags:
 	rm -f tags
-	find . -name '*.[hc]' -exec ctags --append {} +
+#	find . -name '*.[hc]' -exec ctags --append {} +
 
 TAGS:
 	rm -f TAGS