Workaround bug in autoconf 2.69

Autoconf 2.69 does not expand the $(target_cpu) variable when creating
directories, hence we have to do things manually.  Also it doesn't
seems to like the @var@ variable replacements.

Signed-off-by: Giuliano Belinassi <gbelinassi@suse.de>

configure.ac

@@ -226,16 +226,21 @@ AC_SUBST([PAGE_SIZE], [$($GETCONF PAGE_SIZE)]))
 _NOPS_LEN=0
 _PRE_NOPS_LEN=0
 
-AS_CASE([$host_cpu],
+_LD_LINUX=""
+AS_CASE([$target_cpu],
         [x86_64],
         [
           _NOPS_LEN=16
           _PRE_NOPS_LEN=14
+          _LD_LINUX="ld-linux-x86-64.so.2"
+          _PROC="x86_64"
         ],
         [powerpc64le],
         [
           _NOPS_LEN=19
           _PRE_NOPS_LEN=18
+          _LD_LINUX="ld64.so.2"
+          _PROC="powerpc64le"
         ]
 )
 
@@ -247,15 +252,14 @@ AC_DEFINE_UNQUOTED([ULP_NOPS_LEN], [$ULP_NOPS_LEN],
 AC_DEFINE_UNQUOTED([PRE_NOPS_LEN], [$PRE_NOPS_LEN],
 [Padding nops before the entry point of functions])
 
-_LD_LINUX=""
-AC_CHECK_FILE("/usr/lib64/ld-linux-x86-64.so.2",
-              AC_SUBST([_LD_LINUX], "ld-linux-x86-64.so.2"))
-AC_CHECK_FILE("/usr/lib64/ld64.so.2",
-              AC_SUBST([_LD_LINUX], "ld64.so.2"))
+AC_DEFINE_UNQUOTED([LD_LINUX], ["$_LD_LINUX"],
+[Path to the ld-linux loader] )
 
-AC_DEFINE_UNQUOTED([LD_LINUX], ["$_LD_LINUX"], [Path to the ld-linux loader] )
+# Workaround a bug in autoconf 2.69
+AM_CONDITIONAL([CPU_X86_64],  [test "$_PROC" == "x86_64"])
+AM_CONDITIONAL([CPU_PPC64LE], [test "$_PROC" == "powerpc64le"])
 
-# Check if -fpatchable-function-entry=$ULP_NOPS_LEN,$PRE_NOPS_LEN works
+# Check if -fpatchable-function-entry=$ULP_NOPS_LEN,$RE_NOPS_LEN works
 # correctly.
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
   [[extern void g(void);

lib/Makefile.am

@@ -24,17 +24,35 @@ libpulp_la_SOURCES = \
   interpose.c \
   msg_queue.c \
   insn_queue.c \
-  error.c \
-  arch/$(target_cpu)/ulp_interface.S \
-  arch/$(target_cpu)/patch.c
-libpulp_la_DEPENDENCIES= libpulp.versions
+  error.c
+
 libpulp_la_LDFLAGS = \
   -ldl \
-  -l:@_LD_LINUX@ \
   -Wl,--version-script=$(srcdir)/libpulp.versions \
   -Wl,--hash-style=sysv \ # Ubuntu seems to default to gnu, so be clear we ...
   $(AM_LDFLAGS) # ... want old style hash sections, else DT_HASH is empty.
 
+# Workaround a bug in Autoconf 2.69
+if CPU_X86_64
+libpulp_la_SOURCES += \
+  arch/x86_64/ulp_interface.S \
+  arch/x86_64/patch.c
+
+libpulp_la_LDFLAGS += \
+  -l:ld-linux-x86-64.so.2
+endif
+
+if CPU_PPC64LE
+libpulp_la_SOURCES += \
+  arch/powerpc64le/ulp_interface.S \
+  arch/powerpc64le/patch.c
+
+libpulp_la_LDFLAGS += \
+  -l:ld64.so.2
+endif
+
+libpulp_la_DEPENDENCIES= libpulp.versions
+
 libpulp_la_LIBADD = $(top_builddir)/common/libcommon.la
 
 AM_CFLAGS += -I$(top_srcdir)/include -I$(top_srcdir)/include/arch/$(target_cpu)

tests/Makefile.am

@@ -560,9 +560,19 @@ manyprocesses_LDADD = libmanyprocesses.la
 manyprocesses_DEPENDENCIES = $(POST_PROCESS) $(METADATA)
 
 dlsym_SOURCES = dlsym.c
-dlsym_LDADD = -lpthread -ldl -lrt -l:@_LD_LINUX@
+dlsym_LDADD = -lpthread -ldl -lrt
 dlsym_DEPENDENCIES = $(POST_PROCESS) $(METADATA)
 
+# Workaround a bug in Autoconf 2.69
+if CPU_X86_64
+dlsym_LDADD += \
+  -l:ld-linux-x86-64.so.2
+endif
+if CPU_PPC64LE
+dlsym_LDADD += \
+  -l:ld64.so.2
+endif
+
 stress_SOURCES = stress.c
 stress_LDADD = libstress.la
 stress_DEPENDENCIES = $(POST_PROCESS) $(METADATA)

tools/Makefile.am

@@ -55,8 +55,18 @@ ulp_SOURCES = \
   pcqueue.c \
   extract.c \
   set_patchable.c \
-  insn_queue.c \
-  arch/$(target_cpu)/post-arch.c
+  insn_queue.c
+
+# Workaround a bug in Autoconf 2.69
+if CPU_X86_64
+ulp_SOURCES += \
+  arch/x86_64/post-arch.c
+endif
+
+if CPU_PPC64LE
+ulp_SOURCES += \
+  arch/powerpc64le/post-arch.c
+endif
 
 ulp_LDADD = $(top_builddir)/common/libcommon.la -lelf -ljson-c -lpthread -ldl $(LIBUNWIND_LIBS)