[Buildroot] [git commit branch/2021.02.x] package/libmodsecurity: disable -fPIC on m68k_cf

[Peter Korsgaard <peter@korsgaard.com>]

commit: https://git.buildroot.net/buildroot/commit/?id=0eac66e0e9de27e0a118ed4c4cc5c88ba1db39b7
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2021.02.x

This package has -fPIC gcc option set by default but we can't use it on
m68k_cf since it doesn't support it throwing a gcc build failure. So let's
disable it by passing -fno-PIC.

Fixes:
http://autobuild.buildroot.net/results/b92980a563fe7ee331e70f288ce041be0bf29d40/

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 2a48a6ee9d6b81c804182ff0ad6e0f7c850f6839)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 package/libmodsecurity/libmodsecurity.mk | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/package/libmodsecurity/libmodsecurity.mk b/package/libmodsecurity/libmodsecurity.mk
index 66e7e522a1..be46eb6e02 100644
--- a/package/libmodsecurity/libmodsecurity.mk
+++ b/package/libmodsecurity/libmodsecurity.mk
@@ -52,4 +52,14 @@ else
 LIBMODSECURITY_CONF_OPTS += --without-maxmind
 endif
 
+LIBMODSECURITY_CXXFLAGS = $(TARGET_CXXFLAGS)
+
+# m68k_cf can't use -fPIC that libmodsecurity forces to use, so we need
+# to disable it to avoid a build failure.
+ifeq ($(BR2_m68k_cf),y)
+LIBMODSECURITY_CXXFLAGS += -fno-PIC
+endif
+
+LIBMODSECURITY_CONF_OPTS += CXXFLAGS="$(LIBMODSECURITY_CXXFLAGS)"
+
 $(eval $(autotools-package))
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