--- a/fortran/Makefile.am	2026-03-23 17:16:01.063425472 +0100
+++ b/fortran/Makefile.am	2026-03-23 17:16:51.134832997 +0100
@@ -37,7 +37,8 @@
 mp_modx.o: mp_mod.o
 $(MPMODULEX): mp_modx.o
 
-pkglib_DATA = $(MODULES)
+arpreclibdir = $(pkglibdir)
+arpreclib_DATA = $(MODULES)
 
 DEMO = pslq1$(EXEEXT) pslq2$(EXEEXT) pslq3$(EXEEXT) pslqm1$(EXEEXT) \
        pslqm2$(EXEEXT) pslqm3$(EXEEXT) quadgs$(EXEEXT) quaderf$(EXEEXT) \
--- a/configure.ac	2026-03-23 18:21:46.284475297 +0100
+++ b/configure.ac	2026-03-23 18:22:31.006947491 +0100
@@ -35,7 +35,7 @@
 
 # Checks for command-line options
 # --enable-inline option.
-AC_ARG_ENABLE(enable_inline, AC_HELP_STRING(--enable-inline, [inline commonly used functions.  [[default=yes]]]))
+AC_ARG_ENABLE(inline, AC_HELP_STRING(--enable-inline, [inline commonly used functions.  [[default=yes]]]))
 AC_MSG_CHECKING([if commonly used function is to be inlined])
 if test "x$enable_inline" != "xno"; then
   enable_inline="yes"
@@ -44,7 +44,7 @@
 AC_MSG_RESULT($enable_inline)
 
 # --enable-debug
-AC_ARG_ENABLE(enable_debug, AC_HELP_STRING(--enable-debug, [enable debugging code. [[default=no]]]))
+AC_ARG_ENABLE(debug, AC_HELP_STRING(--enable-debug, [enable debugging code. [[default=no]]]))
 AC_MSG_CHECKING([if debugging code is to be enabled])
 if test "x$enable_debug" = "xyes"; then
   AC_DEFINE([ARPREC_DEBUG], [1], [Define to 1 to enable debugging code.])
@@ -54,7 +54,7 @@
 AC_MSG_RESULT($enable_debug)
 
 # --enable-always-fix-fpu
-AC_ARG_ENABLE(enable_always_fix_fpu, AC_HELP_STRING(--enable-always-fix-fpu, [Use FPU fix whenever C interface is called.  [[default=no]]]))
+AC_ARG_ENABLE(always_fix_fpu, AC_HELP_STRING(--enable-always-fix-fpu, [Use FPU fix whenever C interface is called.  [[default=no]]]))
 if test "x$enable_always_fix_fpu" = "xyes"; then
   AC_DEFINE([ALWAYS_FIX_FPU], [1], [Define to 1 to use FPU fix whenever C interface is called.])
 else
@@ -118,7 +118,7 @@
 fi
 
 # --enable-qd
-AC_ARG_ENABLE(enable-qd, AC_HELP_STRING(--enable-qd, [Use quad-double (QD)
+AC_ARG_ENABLE(qd, AC_HELP_STRING(--enable-qd, [Use quad-double (QD)
 library. [[default=no]]]))
 if test "x$enable_qd" = "xyes"; then
   AC_CHECK_QD([2.3], [CXXFLAGS="$CXXFLAGS $QD_CXXFLAGS"])
@@ -128,7 +128,7 @@
 fi
 
 # --enable-fma
-AC_ARG_ENABLE(enable_fma, AC_HELP_STRING(--enable-fma, [use fused multiply-add/subtract (auto,gnu,c99,ibm,compiler).  Use this option with care.  [[default=auto]]]))
+AC_ARG_ENABLE(fma, AC_HELP_STRING(--enable-fma, [use fused multiply-add/subtract (auto,gnu,c99,ibm,compiler).  Use this option with care.  [[default=auto]]]))
 if test "x$enable_fma" = "x"; then
   enable_fma="auto"
 fi
@@ -174,7 +174,7 @@
     FCFLAGS="-O2"
   fi
 fi
-AC_ARG_ENABLE(enable_fortran, AC_HELP_STRING(--enable-fortran, [build Fortran interfaces [[default=auto]]]))
+AC_ARG_ENABLE(fortran, AC_HELP_STRING(--enable-fortran, [build Fortran interfaces [[default=auto]]]))
 if test "x$enable_fortran" != "xno"; then
   AC_LANG_PUSH(Fortran)
   AC_PROG_FC([xlf95 ifort pathf95 f95 gfortran g95 pgf95 lf95 fort ifc efc pathf90 xlf90 pgf90 epcf90 xlf f90])