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--- gprolog-1.5.0.orig/src/configure.in 2021-07-08 09:34:44.000000000 -0000
+++ gprolog-1.5.0/src/configure.in 2021-07-10 16:25:44.397630093 -0000
@@ -342,15 +342,26 @@
dnl we use AS0 instead of AS else AC_CHECK_TOOL does not work
dnl (instead of testing a prefix like x86_64-w64-mingw32- it will
dnl think the user wants to override the test)
- AS0=as
- case "$host" in
- sparc64*bsd*) ASFLAGS='-Av9a -64 -K PIC';;
- i*86*darwin1*) ASFLAGS='-arch i686';;
- i*86*linux*) ASFLAGS='--32';;
- x86_64*solaris*) AS0=gas; ASFLAGS='--64';;
- x86_64*darwin*) ASFLAGS='-arch x86_64';;
- x86_64*linux*) ASFLAGS='--64';;
- *) if test "$with_gas" = yes; then AS0=gas; fi;;
+ case "$CC" in
+ *cc)
+ AS0=as
+ case "$host" in
+ sparc64*bsd*) ASFLAGS='-Av9a -64 -K PIC';;
+ i*86*darwin1*) ASFLAGS='-arch i686';;
+ i*86*linux*) ASFLAGS='--32';;
+ x86_64*solaris*) AS0=gas; ASFLAGS='--64';;
+ x86_64*darwin*) ASFLAGS='-arch x86_64';;
+ x86_64*linux*) ASFLAGS='--64';;
+ *) if test "$with_gas" = yes; then AS0=gas; fi;;
+ esac
+ ;;
+ *clang)
+ AS0=$CC
+ ASFLAGS='-c'
+ ;;
+ *)
+ AC_MSG_ERROR([unsupported compiler $CC])
+ ;;
esac
AC_CHECK_TOOL([AS],[$AS0])
AC_PROG_RANLIB