Allow an --enable-pic option to turn on -fPIC compiler option when building.

The default is disabled until we know this doesn't break anyone.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32635 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 54 insertions, 26 deletions

diff --git a/configure b/configure
index 72bfb11fc5..61378672a4 100755
--- a/configure
+++ b/configure
@@ -835,6 +835,7 @@ JIT
 TARGET_HAS_JIT
 ENABLE_DOXYGEN
 ENABLE_THREADS
+ENABLE_PIC
 TARGETS_TO_BUILD
 ENABLE_CBE_PRINTF_A
 EXTRA_OPTIONS
@@ -1525,6 +1526,8 @@ Optional Features:
   --enable-jit            Enable Just In Time Compiling (default is YES)
   --enable-doxygen        Build doxygen documentation (default is NO)
   --enable-threads        Use threads if available (default is YES)
+  --enable-pic            Build LLVM with Position Independent Code (default
+                          is NO)
   --enable-targets        Build specific host targets:
                           all,host-only,{target-name} (default=all)
   --enable-cbe-printf-a   Enable C Backend output with hex floating point via
@@ -4652,6 +4655,30 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
+# Check whether --enable-pic was given.
+if test "${enable_pic+set}" = set; then
+  enableval=$enable_pic;
+else
+  enableval=default
+fi
+
+case "$enableval" in
+  yes) ENABLE_PIC=1
+ ;;
+  no)  ENABLE_PIC=0
+ ;;
+  default) ENABLE_PIC=0
+ ;;
+  *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-pic. Use \"yes\" or \"no\"" >&5
+echo "$as_me: error: Invalid setting for --enable-pic. Use \"yes\" or \"no\"" >&2;}
+   { (exit 1); exit 1; }; } ;;
+esac
+
+cat >>confdefs.h <<_ACEOF
+#define ENABLE_PIC $ENABLE_PIC
+_ACEOF
+
+
 TARGETS_TO_BUILD=""
 # Check whether --enable-targets was given.
 if test "${enable_targets+set}" = set; then
@@ -10299,7 +10326,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 10302 "configure"
+#line 10329 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12443,7 +12470,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 12446 "configure"' > conftest.$ac_ext
+  echo '#line 12473 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -14161,11 +14188,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14164: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14191: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:14168: \$? = $ac_status" >&5
+   echo "$as_me:14195: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -14429,11 +14456,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14432: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14459: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:14436: \$? = $ac_status" >&5
+   echo "$as_me:14463: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -14533,11 +14560,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14536: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14563: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:14540: \$? = $ac_status" >&5
+   echo "$as_me:14567: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -16985,7 +17012,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 16988 "configure"
+#line 17015 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -17085,7 +17112,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 17088 "configure"
+#line 17115 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -19453,11 +19480,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:19456: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:19483: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:19460: \$? = $ac_status" >&5
+   echo "$as_me:19487: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -19557,11 +19584,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:19560: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:19587: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:19564: \$? = $ac_status" >&5
+   echo "$as_me:19591: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -21127,11 +21154,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21130: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21157: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:21134: \$? = $ac_status" >&5
+   echo "$as_me:21161: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -21231,11 +21258,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:21234: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:21261: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:21238: \$? = $ac_status" >&5
+   echo "$as_me:21265: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -23466,11 +23493,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:23469: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:23496: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:23473: \$? = $ac_status" >&5
+   echo "$as_me:23500: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -23734,11 +23761,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:23737: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:23764: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:23741: \$? = $ac_status" >&5
+   echo "$as_me:23768: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -23838,11 +23865,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:23841: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:23868: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:23845: \$? = $ac_status" >&5
+   echo "$as_me:23872: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -34170,6 +34197,7 @@ JIT!$JIT$ac_delim
 TARGET_HAS_JIT!$TARGET_HAS_JIT$ac_delim
 ENABLE_DOXYGEN!$ENABLE_DOXYGEN$ac_delim
 ENABLE_THREADS!$ENABLE_THREADS$ac_delim
+ENABLE_PIC!$ENABLE_PIC$ac_delim
 TARGETS_TO_BUILD!$TARGETS_TO_BUILD$ac_delim
 ENABLE_CBE_PRINTF_A!$ENABLE_CBE_PRINTF_A$ac_delim
 EXTRA_OPTIONS!$EXTRA_OPTIONS$ac_delim
@@ -34187,7 +34215,6 @@ NM!$NM$ac_delim
 ifGNUmake!$ifGNUmake$ac_delim
 LN_S!$LN_S$ac_delim
 CMP!$CMP$ac_delim
-CP!$CP$ac_delim
 _ACEOF
 
   if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -34229,6 +34256,7 @@ _ACEOF
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   cat >conf$$subs.sed <<_ACEOF
+CP!$CP$ac_delim
 DATE!$DATE$ac_delim
 FIND!$FIND$ac_delim
 MKDIR!$MKDIR$ac_delim
@@ -34296,7 +34324,7 @@ LIBOBJS!$LIBOBJS$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 65; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 66; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5