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build system: explicitly check for the C++ preprocessor

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Otherwise setting PKG_CONFIG_PATH may interfere, and CXXCPP won't be
set. This in turn leads to problems detecting Boost.
This commit is contained in:
Moritz Bunkus 2017-02-13 20:21:27 +01:00
parent 568affaaf4
commit 6f7b760d34
1 changed files with 1 additions and 0 deletions
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ac/initialization.m4
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@ -6,6 +6,7 @@ AC_PROG_CC_C_O
AC_PROG_CPP
SAVED_CXXFLAGS="$CXXFLAGS"
AC_PROG_CXX
AC_PROG_CXXCPP
CXXFLAGS="$SAVED_CXXFLAGS"
AC_PROG_MAKE_SET
AC_PROG_INSTALL